I am wondering what the impact would be if we banned all sporting and entertaining events. The traffic congestion is just terrible. Like a CO2 farm. This could also be said about shopping areas and movie theatres. Come to think of it toll booths often have congestion.
So, if the answer was electric cars it would be easy. Except power plants generate emissions when they produce electricity. So obviously wind and solar come to mind.
So maybe , we just need to stop people gathering for shopping and entertainment until we are powered by wind and solar.