But burning fossil fuels makes water, and also CO2 for the plants. The white, visible part of what you see coming out of a tail pipe is water vapor. The main t

But burning fossil fuels makes water, and also CO2 for the plants. The white, visible part of what you see coming out of a tail pipe is water vapor. The main thing is, we are not making any new carbon that was not already here billions of years ago. :)