evidence: The Earth is heating up, and human beings burning fossil fuels are the dominant cause. It’s not ocean warming that dominates, it’s not cosmic rays, it’s not variations in the Earth’s orbit and tilt toward the sun (Milankovitch cycles), it’s not solar irradiance – it’s us. But there is a very vocal minority that refuses to accept that global heating is real. [...] - Myth #5: CO2 is such a weak greenhouse gas that it cannot be the cause of the observed warming. [...] DENIER MYTH#18: The influence of CO2 cannot match the influence of water vapor, and since the impacts of water vapor are largely unknown and outside direct human control, human beings cannot be the source of global heating (Source: Comments on Digg.com’s post about this blog originally, but scattered around the net as well).