CFCs hasten the natural destruction of of ozone by adding extra chlorine to the stratosphere. A single molecule of chlorine can devour thousands of molecules of ozone- chlorine catalyzes ozone destruction. See the seasonal change in ozone over the South Pole . Ozone and CFCs are greenhouse gases. Over limited regions, aerosols have a negative radiative effect countering that of anthropogenic greenhouse gases.
Acid rain degrades forests and fish stocks in lakes.
As a result, many countries are trying to curb emissions of these gases. Predicted future greenhouse forcing.