This was a very interesting presentation: http://www.ted.com/talks/bill_gates.html. I have never been a fan of Bill Gates. But this was a good presentation and in some way he actually manage make it a void question whatever and to what extent CO2 is causing global warming. The solution is of course simple, make the alternative to burning fossil fuel so cheap that there is no point in creating CO2 for power.
By the end of the presentation he managed to make fun of climate skeptics. Ok, I can live with that :-)