Global warming is about big business making more money, the transfer of even more money from the poor to the already rich and with the result there is no change in the earths temperature because of the logarithmic effect of CO2, it makes little difference to temperature as CO2 levels increase. We have been experiencing warming through natural variation because we have just come off the lowest temperature in the last 10,000 years. As the oceans warm they release more CO2, so CO2 levels rise. Humans contribute 3% to the CO2 levels, so of the current 417ppm level we are responsible for 12-13ppm, and if you think that this small amount would create any warming I have a bridge I can sell you. Again............ SUCKER!!!!!