Re: "David JC MacKay", "Sustainable Energy"
"8.4% biomass (whatever that is)."
Primarily, that's burning wood. Essentially, the same as a coal fired power station, only it's little pellets of wood blasted into the flames instead of ground up coal dust. Most of the wood pellets are from cutting down trees in the USA and shipping them over to the UK using ships running on the dirtiest most obnoxious "diesel" imaginable. Those US forest are supposed to be fully "sustainable", but some investigation (BBC? Panorama?) have shown they are not always planting any trees to replace them, let alone the better than 1:1 replacement they claim.