EPA gets airborne

The EPA just claimed jurisdiction over the world's airlines.  They are gonna publish regulations on aircraft emissions.  Not that this will reduce emissions, it will just serve as a tax on air travel. 
   The best engineers in the world have been working flat out for 100 years to make aircraft more efficient.  They have had some success, new airliners with the latest engines are a tad more fuel efficient than ones built 10 years ago.  Boeing and Airbus salesmen claim as much as 20%, most people will allow them 5%.  That's enough for the airlines to order new planes and mothball what they are flying now.  Boeing has a backlog of 900 orders for its latest 787 model.  And nearly as many for its re engined 737 MAX.  Airbus is doing likewise.  In short, the most fuel efficient possible airliners are in full production and going into service as fast as they roll off the production line. 
   With jet fuel at $2.50 a gallon the airlines have all the incentive necessary to conserve fuel as much as possible.  The air frame builders have every incentive to improve fuel burn, namely,  planes that burn less fuel have better range and can haul bigger loads. 
   In a nutshell, market forces have made air travel as fuel efficient as possible.  EPA regulation won't improve anything, it will serve in place of a tax.  In the depths of Great Depression 2.0, we don't need more taxes.