CFCs caused that, and too many SUVs on one side of the world contributed to the imbalance. We need to take a lesson from Guam. It would not have tipped over and sunk if there were not so many people living on one side of the island and parking their big cars in one parking lot there at the Beach Mall.
The utter stupidity of environmentalists was banning the CFCs in asthma inhalers in the name of the ozone layer and environment, when one volcanic eruption puts out more sulfates and CO2 than all inhalers used all year.