Aerosols have a short lifetime, so once we stop emitting them, their atmospheric abundance will go to zero in a few months. This is a very important goal – aerosols are one of the primary components of air pollution, which kills millions of people around the world every year. However, these aerosols are also cooling the climate, so cleaning up the air and saving these lives will remove something that’s masking about one-third of the radiative forcing from greenhouse gases. Estimate how much warming we will eventually experience if we clean up the air and aerosol radiative forcing goes to zero (assume all other sources of radiative forcing are unchanged).