How Could There Not Be Global Warming?

Anthropogenic global warming, I mean. We know that we are adding 26 billion tons of CO2 to the atmosphere each year. That's enough to double the amount of atmospheric CO2 in 108 years, since the atmosphere already contains about 2800 billion tons of CO2.

We've known about the greenhouse effect of a planet's atmosphere since 1824. Without our atmosphere, the average surface temperature of the Earth would be about -18 C, whereas in fact it is about 15 C.

We know that CO2 is responsible for about 26% of the greenhouse effect on the Earth, and we know that the amount of CO2 in the atmosphere increased from 313 ppm in 1960 to 375 ppm in 2005, an increase of 20%. The only way to get this out of the atmosphere would be to increase the Earth's plant biomass by 20% - is that happening?

These are just the facts, no matter what you think of global warming, these are facts you cannot dispute. Therefore the burden of proof is on the naysayers. If someone is going to deny anthropogenic global warming, then they need to come up with some reason why we WOULD NOT have global warming in light of the clear facts which we know to be true.