Re: Carbon neutral but still not climate change neutral
It's true Water Vapour is a greenhouse gas, BUT it is a significantly milder greenhouse gas.
This is not correct because there is far more water vapour than CO2 in the atmosphere. The overall effect is a stronger greenhouse contribution.
Actually its more complex then that, because Water Vapour's effect on climate change is dependent on temperature to a large extent (the hotter it is, the more effect it has).
The effect depends on the altitude. if it is close to the ground the reflected sunlight might be more than the trapped heath. If it is very high instead it is the opposite, you can easily notice by yourself comparing the temperature you feel in a night with or without clouds. That is why vapour released by engine planes is the worst one.
Temperature comes into play because the warmer it is the higher the chance it goes up with a thermal current. That is why the vapour released by the cooling tower of a power plant (and all the other combustion engines to a lesser degree) is more damaging than vapour created in other ways.