Brood, if you compare the rate at which the global temperature has been increasing with the rate that CO2 in the atmosphere has been increasing the two charts will match up identically. How could that be a coincidence?
And the CO2 that is going into the atmosphere is almost entirely due to human activity. Some of it can be caused by Volcanic activity, but the overwhelming majority is from the burning of fossil fuels. If you look at coal or oil this is Carbon that has been taken out of the natural cycle and buried deep inside the Earth for literally millions of years, but in the space of just a few hundred years mankind has taken this millions upon millions of years worth of fossilized Carbon, ripped out of the Earth, and then burned it and sent it all into the atmosphere. So we are seeing carbon levels in the atmosphere now that the Earth has not seen since the time of the dinosaurs. You know that gas that you pumped in your car today? 100 million years ago that could have been a T-Rex, and it got buried under the ground and was out of the carbon cycle for all that time, but then when you burn it its put back into the carbon cycle.
If it weren't for man these sequestered carbon in the form of fossil fuels would stay in the ground for millions if not billions of more years. How would it ever get back out of the ground? If it weren't for mankind it would stay buried. We're the reason this genie is being let back out of the bottle. There is no denying that.