Does all of the exhaust fumes of all the cars around the world contribute to any change in Climate?
Well, in the micro sense, but I am yet to be convinced of the macro sense. Also, what about the exhaust fumes of the fossil fuels that must continuously be sure to restart wind turbines or used for supplementary electricity sources when the sun powered stations don't have quite enough? The loss of the power from a charged "battery" of sorts that solar power inputs, will lose a good bit of power across a long distance. Fossil fuels must be used in my examples of "green" energy unless you use nuclear.
None of it is as simple as recycle. It's more about reuse and reduce. But even that isn't changing the global climate, though it makes for a much nicer local environment.
How about the destruction of critical long term climate data at University of East Anglia? Once the Hockey stick graph was produced, the data disappeared. Coincidence? Is refusing to release data, coincidence? No, I am not convinced of man caused global climate change.