How much pollution is prevented switching an average intersection to LEDs? (list all and amounts) Again for the same Arkansas example, the Life cycle air pollution reduction is 41 million pounds in carbon dioxide, and the Air pollution reduction equivalence is the same as having 3,599 cars removed from the road per year which is also the same as saving the equivalent of 5,674 acres of the forest. This was done with a payback time of only 2.4 years