back to article Hey, maybe we should all be cat-faced eco-warriors on our daily video chats

Bitcoin miners are using more energy than Argentina. Turning off your video camera during Zoom will save the planet. I am not a cat, I am a lawyer. Those who laud the transformational power of IT can't overlook that some of these transformations are very weird indeed. Those three recent news stories – one of which you will …

  1. KittenHuffer Silver badge

    All we need is ....

    .... room temperature super-conductors!

    We build solar panel farms in 'sunny' deserts, lay cables to where people live, and pretty much all the carbon pumping stops.

    So what we need is good old R&D, hoping that them brainy scientists will manage to come up with something.

    And to do that we need gum'nts to increase R&D budgets rather than cut them.

    1. JetSetJim

      Re: All we need is ....

      > We build solar panel farms in 'sunny' deserts, lay cables to where people live, and pretty much all the carbon pumping stops.

      Under investigation with the Desertec project(s). One of the hurdles is cable-loss of electrical energy - 3% per 1000km, or 10% for 3000km (straight line distance from central UK to central Algeria, for example). But it has laudible aims.

      1. jmch Silver badge

        Re: All we need is ....

        Is the transmission efficiency issue really that serious? Yes, you have 10% loss over 3000km, so you need to build 11% larger power plant than strictly required. But you have to compare end-to-end efficiency including the panels themselves. Solar panels are about 15% more efficient in Madrid than Munich (https://www.altenergymag.com/article/2005/08/solar-energy-potential-at-different-latitudes/120/) so the Sahara vs central or northern Europe should be at least 20% more efficient.

        Plus, land in the Sahara is literally dirt-cheap, and building solar panels and batteries in such phenomenal bulk will probably bring the prices down hugely, making the plant cost much much cheaper than any plant (solar, wind, hydro...) in Europe where land costs are much higher. That should at least partly compensate for the cable cost.

        Compare that to the environmental and geopolitical alternative of continuing to depend on oil from the middle east or US fracking, gas from Russia etc. Sure there is a huge upfront capital cost but long-term it's actually a no-brainer.

      2. Jellied Eel Silver badge

        Re: All we need is ....

        Under investigation with the Desertec project(s). One of the hurdles is cable-loss of electrical energy - 3% per 1000km, or 10% for 3000km (straight line distance from central UK to central Algeria, for example). But it has laudible aims.

        Or laughable. Like proposing Libya as a suitable place for operations. But then much of the nations in & around the Sahara have their own security and insurgency issues. And then of course there's the cost of interconnecting N.Africa & tieing it into the EU's not-so-SuperGrid. On the plus side, given freezing conditions in N.Europe* at the moment, and Germany's reliance on 'renewables', there's high demand for electricity, and high prices because 'renewables' don't work. But there's also the issue of downstream shenanigans, and costs/losses, especially for nations at the end of the line, like the UK and Ireland.

        And then there's boring practical stuff, like not getting your solar panels (PV or reflectors) sandblasted, or their steering mechanisms gunked up. Having panel washers obviously needs water, which is rather scarce in the proposed locations. I guess compressed air curtains could be used instead, but would add to costs.

        And then there's the politics.. Like N.Africa or sub-Saharan Africa not having access to electricity for much of it's populations. But then countries like Morocco are building their own solar plants to provide energy for their own populations.

        And I guess if you're up for grand, ambitious energy projects, I guess a tidal generation scheme between Gibraltar & Morocco could be fun given the fast currents through the straits.

        1. jmch Silver badge

          Re: All we need is ....

          "Or laughable. Like proposing Libya as a suitable place for operations. But then much of the nations in & around the Sahara have their own security and insurgency issues."

          I'm not hearing anyone propose Libya, the articles mention Algeria. A quick look the map also reveals that Libya is approx 500km further south, it makes much more sense to focus on Morocco, Algeria and Tunisia. All of which do have their own security issues of course, but the deal the EU could offer (not just lots of cash for the electricity but also institutional support and market access) could ensure a much better security of supply than, say, with Russian gas. With the bonus of dealing with these nations as economic partners can be a basis for promoting democracy and good governance, something that isn't going to make any traction in Russia.

          "tieing it into the EU's not-so-SuperGrid"

          Fair enough, the EU grid needs upgrading, but it needs upgrading anyway. In any case it's probably more effective to have multiple generation stations in Morocco / Algeria / Tunisia and multiple connections from N. Africa to Spain (directly and/or through Mallorca), France (directly and/or through Sardegna / Corsica) and Italy (directly and/or through Sicily), as well as long-distance interconnectors that go directly to central Europe. It certainly increases robustness. I have no idea about the engineering aspect of large scale grid electricity but I suspect it would also be better to have multiple interconnectors and points of supply into the grid than a single big one.

          1. Jellied Eel Silver badge

            Re: All we need is ....

            I'm not hearing anyone propose Libya, the articles mention Algeria. A quick look the map also reveals that Libya is approx 500km further south, it makes much more sense to focus on Morocco, Algeria and Tunisia.

            Well, Libya, not so much any more, but-

            https://www.reuters.com/article/us-climate-desertec-idUSTRE7A26YA20111103

            “It’s a positive thing,” said van Son, who heads the executive arm of the project that aims to supply up to 15 percent of Europe’s electricity demands by 2050 by using mirrors to harness the sun’s rays to produce steam and drive turbines.

            “We like the Arab Spring because it has opened up a lot of ideas and generated support for the project,” van Son said in a telephone interview. “We’re very supportive. The democratic structures fit very well with ours.”

            Before the Arab Spring, there had long been concerns about the political stability in the region.

            Uh oh.. foreshadowing..

            Van Son said now that the fighting in Libya is over, a project like Desertec could help the economy and create jobs in the country and throughout the region, especially for young people.

            Oops. Kinda jumped the gun there with the forward looking statement, because the guns in Libya are still very much active. So for Libya, the 'Arab Spring' & regime change hasn't been a great step forward to democracy. Not to mention the term is rather racist given N.Africans aren't 'Arabs'.

            But Libya was once considered an ideal partner because it's further south, thus closer to the equator & benefitting from higher solar insolation.

      3. KittenHuffer Silver badge
        Boffin

        Re: All we need is ....

        I did say super-conductors!!!!

        The losses would be 0%. If it was any more than that then they wouldn't be super-conducting!

        1. Anonymous Coward
          Anonymous Coward

          Re: All we need is ....

          But what would be the carbon footprint of manufacturing 3000km long room-temperature superconductors? :-D

          1. A.P. Veening Silver badge

            Re: All we need is ....

            Completely recoverable with the increased efficiency of energy transport. Besides that, with a sufficient starting set of solar panels and superconductors, you can easily make more of each without any additional carbon being used. Even better, if you build that solar plant in a desert, the raw materials for more solar panels are all around for the grabbing.

            1. This post has been deleted by its author

            2. Anonymous Coward
              Anonymous Coward

              Re: All we need is ....

              Hold on, hold on.

              How do you 'recover' carbon emissions? At best, you don't make anymore - unless it's possible to be carbon-negative in manufacturing.

              I was only making a joke (people do seem to miss those sometimes), but it's the same problem as the battery one. Yes, going all-EV sounds a lot better than burning fossil fuels to move vehicles around, but once you start looking at the various footprints of the batteries - not to mention what's in them, how much of it there is, and where it has to come from - you realise it's out of the frying pan and into the fire.

              Even if we had a usable room temperature (and pressure) superconductor, making it in long lengths that could do what is asked of them would likely be a complex and labour/energy intensive process in itself.

              1. Jellied Eel Silver badge

                Re: All we need is ....

                How do you 'recover' carbon emissions? At best, you don't make anymore - unless it's possible to be carbon-negative in manufacturing.

                Simples. Just ask Bill Gates, the US's largest farmer and saviour of the planet. He's been backing a technology that's basically a bunch of large fans & filters to suck in air & extract the CO2. Just ignore the cost, and what to do with the CO2 you've produced, which after all is a pollutant and most be disposed of safely. Or I guess sold to Coca Cola & Pepsi to carbonate soft drinks and fizzy water. Or sell it to SpaceX to use in enhanced oil & gas production at it's Texas wells & space port.

              2. juice

                Re: All we need is ....

                > How do you 'recover' carbon emissions? At best, you don't make anymore - unless it's possible to be carbon-negative in manufacturing.

                You recover carbon in the same way as you recover gold from recycled electronics: you extract it.

                For carbon, there's two main ways to get said carbon out of the air. We can use the good old fashioned approach of growing lots of plants to lock the carbon in their cellulose, or we can use technology to extract, compress and liquify the carbon dioxide for storage. E.g. by injecting into old oil wells or salt mines.

                (I even saw an interesting hybrid proposal once, around baling up large quantities of waste high-carbon matter and dropping it into the ocean deeps where it'll eventually crawl under the tectonic plates. 'Course, this assumes that we can find high-carbon matter which isn't suitable for recycling...)

                And for the latter, as long as the carbon used in this process is less than the carbon extracted, we're theoretically onto a winner.

                Of course, the problem is the scale; the world uses over 8 billion tonnes of coal every year, and that's not something you can fix by sticking a few begonias on a windowsill.

                And the other key point is that we're not "recovering" the carbon for reuse, since the entire point is to lock it away and thereby reduce climate change.

                Another point is that EVs aren't just about carbon. They also reduce air pollution (e.g. NOx and particulates), noise pollution, etc.

                For me personally (and as per my various posts, which often attract negative votes), neither EVs nor their support infrastructure are fit for purpose yet. But at some point they will be, and the moment when that arrives seems to be speeding up quite nicely.

                Unlike, say, cold fusion, which has been just twenty years away since before I was born ;)

                1. Anonymous Coward
                  Anonymous Coward

                  Re: All we need is ....

                  You recover carbon in the same way as you recover gold from recycled electronics: you extract it.

                  That's easy for you to say (and that's another joke, so don't take it too literally).

                  But how much energy is expended in employing technology to lock it (carbon) or extract it? Or store it?

                  I mean, the irony is that Mother Earth managed to lock it up for so long as... fossil fuels.

                  All the ideas so far about locking up carbon are on a par with that scene in Armageddon, where they have two weeks to destroy the asteroid, and one of the scientists suggests sending up huge solar sails to deflect it away from Earth.

                  Don't get me wrong. All this stems from someone taking a joke too literally earlier, but there is always a downside to any upside when it comes to moving away from one fuel source to another. And at best, they net cancel each other unless, as you have pointed out, you only focus of certain specific benefits.

                  1. Jellied Eel Silver badge

                    Re: All we need is ....

                    But how much energy is expended in employing technology to lock it (carbon) or extract it? Or store it?

                    Details, details. And don't forget the cost! After all the projects will be producing CO2, which then should attract EPA costs & penalties for producing a deadly pollutant, not reducing production. I'm sure with some creative accounting any production/offsetting costs can be netted to zero, just leaving all the other costs to find a sucker to pay for.

                    And given there's demand for CO2 in many processes (hey, H2+CO2= synthetic gas & oil with a bit of chemical alchemy!) it's a product that could be sold or used, not wasted. Like, I dunno, greenhouse operators to grow all the fruit & veg that'll be needed, if our political classes succumb to the lobbying by militant vegans who want to force people to give up meat.

                    The usefullness of CO2 is frequently overlooked by ecofreaks, along with the 'greening of the planet' and improved crop yields thanks to elevated CO2 levels.. Which in some plants, also reduces water requirements. And especially given increasing evidence that dear'ol Mother Earth has low CO2 sensitivity, ie previous dire predictions for global warming (waves at the US) haven't come true. Which is good news because the general consensus is temperature response to CO2 is logarithmic, hence the 'per doubling', meaning if true, with low sensitivity, we can burn every scrap of carbon on the planet and never get to Thermageddon levels.

                    All of which should have been bleeding obvious given CO2's absorption/emission spectra and the way those overlap water, with the exception of one narrow 'window'. But it's been a great way for politicians to finally figure out they really can tax thin air.

                    But such is politics. T'other fun aspect of geoengineering is suppose we do manage to reduce CO2 levels down to 350ppmv. Then it keeps falling. Then it starts dipping below say, 275ppmv and the plants start dying. And then our climate tends towards Mars, not Venus, and we all kinda die. Something fans of Robert Erlich's 'Population Bomb' may approve of, and probably don't realise that just about every prediction in that book have been proven wrong..

    2. veti Silver badge

      Re: All we need is ....

      If them brainy scientists could do that, they could make a fortune without government help. There's a Nobel waiting for the first useful demo of room-temperature superconductors, for a start.

      1. Dave 126 Silver badge

        Re: All we need is ....

        The superconductor wire doesn't need to operate at room temperatures to be usuable. The composite cable, comprised of the superconductor, coolant and insulation, does.

        Such things are used in some cities where the advantage of a smaller cross section of cable makes up for the expanse - and faff of cooling stations every X metres.

        Our best thermal insulation materials (porous aerogel supporting a vacuum) are a bit delicate.

        Alternative stratagies that have been proposed include using sun power in hot countries to produce hydrogen, ammonia or bioethanol and then shipping it (or pipeline) to where it can be used (and if course the power density of bioethanol over batteries make it a good fit for transport).

        1. Jellied Eel Silver badge

          Re: All we need is ....

          Alternative stratagies that have been proposed include using sun power in hot countries to produce hydrogen, ammonia or bioethanol and then shipping it (or pipeline) to where it can be used (and if course the power density of bioethanol over batteries make it a good fit for transport)

          Alternatively, there's an xkcd for that-

          https://m.xkcd.com/1162/

          Along with past experience of championing bioethanol as a 'green' fuel.. Until people realised that converting cropland to produce vehicle fuel instead of human or animal food was a rather bad idea. Except of course in the US, where corn producers & refiners love the idea, even if adulterated gas has lower fuel efficiency than the real thing.. Not to mention creating problems in the fuel systems & networks., And I'm sure intercontinental hydrogen or ammonia pipelines will be perfectly leak-free.

          But Germany's discovering closing it's nuclear generation to prop up the CDU with Green votes is proving a tad expensive. Such is politics. Forgot to mention in the previous post the fun Texas is having at the moment with record low temperatures freezing up gas production equipment, rendering 'renewables' a tad useless, and creating record-setting energy prices. The usual combo of 'renewables' plus gas turbines kinda doesn't work when there's no gas.

          Meanwhile, nuclear generation is untroubled by 0F temperatures, and is available in convenient 1GW or smaller units, for less than most 'Green' energy scams could hope to deliver. Remember folks, 'renewables' are the cheapest form of energy! Don't ask why electricity prices haven't fallen to match the 'renewable' lobby's BS though..

          1. Boris the Cockroach Silver badge
            Facepalm

            Re: All we need is ....

            I have pointed out the stupidity of that move by Germany, because when they need extra power (such as the past week) its either generated by nuclear (in France) or by burning the most polluting coal on the planet from Poland.

            I could write a decent fiction novel using the above plotline, sadly the publishers would reject it as "Unbelievable... nobody is THAT stupid"

            1. A.P. Veening Silver badge

              Re: All we need is ....

              And you haven't even mentioned the radioactive waste of coal plants.

            2. Jellied Eel Silver badge

              Re: All we need is ....

              I have pointed out the stupidity of that move by Germany, because when they need extra power (such as the past week) its either generated by nuclear (in France) or by burning the most polluting coal on the planet from Poland.

              But we're saving the planet! There is much irony in our 'Age of Stupid'. We're told that 'extreme' weather will become far more common due to global warming. Then we have 'extreme' weather, kind of as predicted and the cure championed by the Greens fails.. Entirely predictably due to solar panels performance at night, or under ice/snow and windmills not working. In their case, possibly even more ironic given Germany's windmills may have fipped from being electricity generators to consumers given the power need for blade de-icing, and turning the blades to prevent bearing damage.

              It'll be interesting to see if there's much damage to 'renewables' post-freeze. Parts of Texas were due an ice storm last night, and the mass of ice freezing on windmill blades might be damaging. Plus the usual problem of the ice bringing down powerlines, or trees and then powerlines. But apparently 3m+ Texas homes without power in 'extreme' and life-threatening weather due to insane energy policy decisions.

              But energy policy has been good for France. UK's been the EU's largest import of electricity, mostly from France. But then Belgium's also closing it's nuclear plants, so importing, then Germany's flipped from exporter to importer, and Norway's demand for electricity's been booming & importing as well. And a lot of France's nuclear fleet is also aging.

              But such is politics. Germany's been building new coal plants to replace the loss from nuclear. Whch burn 'dirty' lignite coal that it strip-mines. But that's not so bad given modern coal plants are far more efficient and less 'polluting' & Germany's dry the lignite using waste heat. Same with Poland's new plants, so Poland may benefit as an exporter.

              Meanwhile, in the UK, loony Greens (and the BBC) have been campaigning to prevent a new coal mine. Ignoring the minor detail that it's to mine coking coal, which is needed for steel production, which is needed for building windmills. Apparently there's some new unicorn process to make steel from iron using Green hydrogen. OK, so I only did A-level chemistry, but I'm fairly sure the difference between iron & steel is the addition of carbon, which hydrogen doesn't provide*, it being elemental and all. Or maybe the plan is to use hydrogen for energy, in which case it's a slight problem of cost. Which will mean UK steel is expensive, so steel gets imported from places like China, increasing the carbon footprint..

              *Then with the dream of a hydrogen economy, there's potential snags with hydrogen embrittlement in metals, meaning billions to replace parts in gas systems that may be affected by transition. But I guess that cunning plan will also create jobs for home builders given hydrogen leaks can be rather dramatic.

          2. jmch Silver badge

            Re: All we need is ....

            Closing nuclear generation plants designed in the 60s and commissioned in the 70s or 80s isn't actually such a bad idea. Most of those plants were approaching end of life anyway. The bad idea is not replacing them with new nuclear designs that are both safer and more efficient.

            The old designs were unsafe and inefficient *on purpose* because of the desired side-effect of producing fissionable material to make bombs (Germany didn't make any bombs but AFAIK their reactor designs were similair to those in the US, UK, France, Russia etc that were used for bomb-making material). Modern reactors are designed to fail safe without active intervention required (unlike eg Fukushima) and also 'burn' all the radioactive material available meaning no bomb-material and significantly less radioactive waste.

            1. Jellied Eel Silver badge

              Re: All we need is ....

              The old designs were unsafe and inefficient *on purpose* because of the desired side-effect of producing fissionable material to make bombs (Germany didn't make any bombs but AFAIK their reactor designs were similair to those in the US, UK, France, Russia etc that were used for bomb-making material).

              Depends what you mean by inefficient. Like you say, the side-effect may have been desireable, if you're exporting the spent fuel rods to nuclear powers who can then recover the naughty bits. Plus it's a case of working with what you've got, ie early-generations of nuclear power plants. Even though there were prototype thorium reactors running in the '50s, but those didn't produce the naughty bits.

              But such is politics. Of which there is much in the nuclear field. Like international treaties wrt highly enriched uranium or plutonium production/usage/proliferation.. Which if you're not planning to turn into instant sunshine can still be very useful. Like US, British, French, Russian naval reactors that run on richer fuel than civil reactors, but also means they can operate for 20+ years without needing to be refuelled. Which also allows them to be more compact due to the xkcd demonstration, which also makes decommissioning simpler.

              Modern reactors are designed to fail safe without active intervention required (unlike eg Fukushima) and also 'burn' all the radioactive material available meaning no bomb-material and significantly less radioactive waste.

              Fukushima was unfortunate, but even though Japan's used to Tsunamis, didn't manage to shut down some of it's reactors in time. But lessons are learned every time there's an incident like that, and designs or procedures improved. And like you say, modern designs can act as nuclear 'waste' recyclers, so should be thoroughly low carbon & green. Yet the ecofreaks object on general principle. Plus there's my favorite example of reactor's ability to produce very useful radioisotopes used in industry & medicine. I'm sure the Greens will come up with very expensive alternatives for producing those via windmills.

            2. A.P. Veening Silver badge

              Re: All we need is ....

              Fukushima was designed to fail safe ... in case of a reactor accident. It wasn't designed to withstand the triple whammy of an earth quake of extra ordinary magnitude, a tsunami more or less focused on that piece of coast and loss of external electricity. Given the location (pretty low on the coast in an earth quake prone country which just coincidentally coined the word "tsunami"), I'd say there was something lacking in that design as electricity is usually one of the first victims of a serious earth quake.

              1. Jellied Eel Silver badge

                Re: All we need is ....

                Fukushima was designed to fail safe ... in case of a reactor accident. It wasn't designed to withstand the triple whammy of an earth quake of extra ordinary magnitude, a tsunami more or less focused on that piece of coast and loss of external electricity.

                Something generally forgotten in the Fukushima 'disaster' is it could have been a lot worse. Several of the reactors at the site were safely shut down & pretty much shrugged the rather extreme event. The ones that didn't AFAIK couldn't be shut down because water stopped the unit's back-up generators from working. So I guess it's one of those optimist/pesimist things. Also a relatively easy fix, ie assume the absolute worst-case 1,000yr flood event, and triple the height of your emergency generator & fuel installation.

                The other sad thing is most people remember it for the 'nuclear disaster', and not all the Japanese that lost lives or property as a result of the tsunami.

  2. Anonymous Coward
    Anonymous Coward

    Video compression

    Most video compression algorithms used in web conferencing already take advantage of the fact that most pixels in a frame are identical to the ones in the previous frame. They transmit a master frame every few seconds for people new to the stream, or to resolve any corruption that has occurred, and other than that most of the information transmitted is a delta from the frame before. They also take into account that humans are much more sensitive to "realistic" movements and colours in other people's faces (or bodies) than to anything else in the shot, so the algorithms provide finer-grained changes in things that look flesh coloured.

    Many of the breakthroughs in video compression and transmission were already made by the porn industry in the 90s/early 2000s when figuring out how to transfer their content over dial-up modems. They probably have some interesting data on how those algorithms work with animal faces on human bodies too.

    1. Greybearded old scrote Silver badge

      Re: Video compression

      I read that wondering if my vague, hand wavey understanding of video compression was really better than the author's. Or does he have knowledge that I don't?

      1. Paul Kinsler

        Re: Video compression

        I think (but I may be wrong) that the author was imagining abstracting real-time face changes as they would apply to a pre-existing facial "avatar" of the subject; which would allow only avatar-relevant updates to be transmitted; and then those would allow a version of the avatar re-animated on the viewer's computer. This would trade bandwidth for cpu, which might make sense, depending on the avatar complexity.

        However, you would have to have given the viewer a copy of your avatar, so they could reconstruct you on screen, which would then enable them to - with ease - appear exactly as you do in a "video" call. Perhaps you could make steganographic changes to the avatar for each different call to help track such naughtiness.

        Hmm.

        1. Dave 126 Silver badge

          Re: Video compression

          > the author was imagining abstracting real-time face changes as they would apply to a pre-existing facial "avatar" of the subject; which would allow only avatar-relevant updates to be transmitted;

          This could be a good approach, if the aim of the video call is to aid expression and communication - after all, it could easily fix the 'eye contact' problem caused by the monitor and the web cam being in different places.

          1. Anonymous Coward
            Anonymous Coward

            Re: Video compression

            That approach is making some very significant assumptions that the amount of data needed to have your avatar display an accurate expression is lower than the delta between a video frame and the next. Humans are very sensitive to the accuracy of facial expressions, and such an approach needs to convey more nuance than just turning your camera off and sending a stream of emojis.

  3. CT

    Zoom calls replacing other emissions?

    Aren't a lot of these "covideo" calls effectively reducing transport emissions to/from the meeting place?

  4. katrinab Silver badge
    Paris Hilton

    My carefully arranged bookcase backdrop doesn't move during zoom calls either. Zoom doesn't transmit the cat face as a vector image, so I doubt that the bitrate requirements are any less than for a human face. Analysing the human face and rendering it as a cat face however does require quite a bit of CPU/GPU work, and that will draw more power.

  5. Totally not a Cylon
    Boffin

    Use the waste heat from a Datacentre

    Wild idea but

    use the waste heat from a datacentre to either heat local properties or drive some kind of generator.

    Even if a heat pump was needed to 'concentrate' the heat energy to make it useful, the initial kick the heat pump would need to start should be offset by any output.

    Blue sky thinking... would it work?

    1. TeeCee Gold badge
      Meh

      Re: Use the waste heat from a Datacentre

      I know! We use the waste heat to power the cooling systems, which will generate more waste heat, which we use to power the cooling systems, which....

      I'm off to the 18th Century to file a patent.

      1. katrinab Silver badge
        Meh

        Re: Use the waste heat from a Datacentre

        Rossi tried that. It didn't work. He also tried a cold fusion device. There isn't much evidence yet to suggest that it is working either, though no doubt his fanbois will disagree. And a waste to oil thing, which he ended up getting jailed for.

        But, a lot of energy is used to produce heat. If you have heat that is otherwise going to go to waste, then it is worthwhile looking to see if someone can make use of it.

    2. Greybearded old scrote Silver badge

      Re: Use the waste heat from a Datacentre

      Driving a generator, not so much. But a really big data center could sell its heat to the neighbours. If they are not placed out in the wilds to be closer to the wind farm than to other buildings. (The likes of Battersea power station used to be combined heat and power, but the killer smog showed that you don't want power stations in populated areas.)

    3. Anonymous Coward
      Anonymous Coward

      Re: Use the waste heat from a Datacentre

      I run bitcoin miners when the weather turns cold, I make money by heating the house :-)

    4. Anonymous Coward
      Anonymous Coward

      Re: Use the waste heat from a Datacentre

      heat local properties

      Ooh, ooh. And we could call them 'storage heaters' - until the datacentre decides to cash in.

    5. AliBear

      Re: Use the waste heat from a Datacentre

      Back in the day, Manchester Uni used the heat from the basement mainframes installation (incl CDC Cyber, and Cray 1) to heat both the Computer Science building and the 'Maths Tower' next door.

    6. TRT Silver badge

      Re: Use the waste heat from a Datacentre

      Warm vast poly tunnels of lettuces, tomatoes etc.

  6. TeeCee Gold badge
    WTF?

    ...use more cooling water in data centres than the city of Los Angeles.

    Really? How?

    Cooling systems come in two flavours. The usual way of doing things is to have an evaporator indoors and a condenser outdoors. Heat is carried between the two by water in pipes. That doesn't "use" water, the water's still there. Once in a blue moon a circuit may be drained for maintenance and its contents then become waste water and new water is used to refill. That doesn't happen very often.

    The other way of doing it is if you happen to be somewhere with a large amount of cold water adjacent (e.g. a glacial river). In that case it makes sense to either replace the condenser with a submerged radiator or just pipe the cold stuff through the building as it passes. You're still not "using" it, just warming it up an imperceptible amount.

    These statistics look a lot like damned lies to me.

    1. Anonymous Coward Silver badge
      Boffin

      Some DCs do actually use evaporative cooling. It's a rarity though.

      1. Clunking Fist

        But even if they do: the evaporated water will eventually condense and fall from the sky, no? No water was harmed in the process.

  7. Chris Miller

    Carbon 'tax' on Bitcoin transactions

    Have you seen the cost of doing a Bitcoin transaction at the moment?

  8. Blackjack Silver badge

    Bitcoin tax

    Is bad for the environment, it gets taxes, it can be tracked and is hard to buy stuff with bitcoin plus anything you buy will cost extra due to transaction fees.

    Why are people buying Bitcoin again?

    1. katrinab Silver badge
      Flame

      Re: Bitcoin tax

      They are buying bitcoin because they think a greater fool will pay even more than them for it.

      1. This post has been deleted by its author

    2. veti Silver badge

      Re: Bitcoin tax

      Google "FOMO".

    3. doublelayer Silver badge

      Re: Bitcoin tax

      I think most people who hoped cryptocurrencies would be handy for use as actual currencies have abandoned the hope for bitcoin. Some have given up entirely and others have found different ones to hope about, but now the people buying and mining bitcoin just want to use it as an investment. A bunch of people who have money to burn and who don't really know why bitcoin is useful are wasting their time and resources, which will work out well for some and badly for others. It's kind of like a large chunk of other investing where nothing's done for actual goals of getting some benefit in the future, only hoping to get some money off someone else in a zero-sum game.

    4. DS999 Silver badge

      Speculators and criminals

      And the more ways that are made available to spend bitcoin the more desirable it is for criminals because it makes money laundering easier if you can convert it into conveniently small but valuable goods like smartphones that can be resold at a small discount to get the currency of your choice (whereas directly converting bitcoin into your currency of choice leaves a trail at the bank that facilitates such an exchange making it easier to be caught)

      1. jmch Silver badge

        Re: Speculators and criminals

        The problem with bitcoin rising in value is that it's deflationary. Why would anyone spend x bitcoin to buy something when in a few weeks bitcoin will be stronger and the same thing would therefore cost less bc?

        Without stability bc can't be used as an exchange of value (not to mention transaction fee and time)

        Bc is being seen as a value store, not a transaction currency

        1. DS999 Silver badge

          Re: Speculators and criminals

          There's no guarantee bitcoin will always go up. "Scarcity" isn't a reason, otherwise people would pay billions for an original artwork by a dead artist who only ever painted one picture.

          Storing value in bitcoin is insane, when it can and has dropped precipitously before. One major terrorist incident when it turns out money was passed from rich Saudis to the terrorists via bitcoin, and governments around the world will crack down on it.

  9. aje21
    Gimp

    Matrox were doing HeadCasting loooong ago

    Always remember the feature of the Matrox Millenium G550 which never really took off:

    https://www.anandtech.com/show/789/3

    (back in the days of analogue monitors I was always a fan of the picture quality from Matrox cards)

  10. Potemkine! Silver badge
    Mushroom

    Eco-warriors: always a bad answer to the wrong problem.

    Look at Greenpiss fighting against nuclear plants, when what kills the most (and by far) and destroys our planet is coal.

    Cutting your video on Zoom will save the Planet? Bollocks. First of all, the Planet will survive us, and next the real problem is not using electricity, but how electricity is produced. When I see so many people buying all that crap, it comforts me in the idea Idocracy is coming.

  11. Paul Hovnanian Silver badge

    Tax Bitcoin mining?

    I was just using all that power and CPU cycles to watch HD porn. Honest!

  12. Emir Al Weeq

    Too specific a tax?

    I don't really agree with the concept of a Bitcoin tax. Put a tax on carbon-polluting energy consumption by all means; but why is it any worse to waste energy on Bitcoin (if that's your thing) than it is to spend it gaming all night or running a hot tub? (I do none of these.) Once I've bought my kWh and paid whatever taxes are appropriate for its means of generation, I should free to use it how I like.

  13. juice

    "AI" video rendering

    > the technology behind it – mapping the movements of key face points to a model visage – could easily be the basis of extremely effective video compression

    This is exactly what Nvidia's Maxine system is doing, and it claims to be able to reduce bandwidth by 90%.

    https://developer.nvidia.com/maxine

    Of course, you then need a beefy Nvidia GPU to do all the processing, so I don't know quite how it compares when it comes to power-consumption...

    In fact, I could have sworn I first read about this stuff on el Reg, but a quick search hasn't thrown up any obvious articles!

  14. User McUser

    Dial-Up

    You could Zoom over a dial-up modem

    You could also, you know, just call them on the phone.

    Think of all the power you'll save with your PC turned off and unplugged...

  15. Jan 0 Silver badge

    Power consumption

    >The study, for example, assumes that increased data transmission involves a proportionate linear growth in power consumption. Which it doesn't. Plug a power meter between your router and the mains, and watch a movie in HD. Then watch one in SD. You will not see an 86 per cent change.

    That doesn't take account of all the routers and repeaters or the severs where the video stream originates.

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