Warmer Earth, greener North
If you had visited Paris or Chicago 50.000 years ago, during the Pleistocene, you would have found a frozen Tundra, similar to what you find today in Northern Canada, parts of Alaska and Siberia. About 10.000 years ago this all changed and warmer climate allowed humanity to develop. It gets cold again and what greens the Earth is more CO2 in the air. CO2 will not make the Earth warmer. I am sorry but this will not protect us from the coming Mini Ice Age. But more CO2 will help nature to cope with much harsher conditions.
