This isn’t exactly reassuring:

Cutting down on fossil fuel pollution could accelerate global warming and help turn parts of Europe into desert by 2100, according to research to be aired on British television on Thursday. “Global Dimming”, a BBC Horizon documentary, will describe research suggesting fossil fuel by-products like sulphur dioxide particles reflect the sun’s rays, “dimming” temperatures and almost cancelling out the greenhouse effect.

The researchers say cutting down on the burning of coal and oil, one of the main goals of international environmental agreements, will drastically heat rather than cool climate.

So, the climate either will, or will not, be warming. It may, or may not, be helped by the reduction of fossil fuel use. Yeah, this makes me feel much better about the global warming science.

Tell me this: if we switch to hydrogen, will all of the residual water it creates mean additional cloud cover and a lower temperature for the earth? Is it possible that the climate is too complex for us to model right now?