Why does the epa think cars are destroying the ozone when airplanes use 1 year worth of fuel in 1 flight?

I think the epa makes it harder for auto manufactors and people who drive to allow cleaner emmisions. However, i know jet fuel or even avgas is a cleaner burning fuel but they waste so much more fuel without the restrictions that auto's have. If you look up how many airplanes that are in the sky, it covers the entire usa. And therefore airplanes are closer to the ozone than cars. I can only ume that private, corporate and commerical aircraft are exempt from this due to payoffs of some sort. I work in aviation and i know jets use in excess of 50,000 gallons per year. Where a car like mine will burn 1,000 gallons in 1 year. Do the math and i think airplanes wreck havoc on the ozone.