Reuters reports:
The United States supports a proposed market-based system to curb carbon emissions from the global aviation sector starting in 2020, but warned that concerns over measures to lower emissions in the interim threaten to undercut the broadly-supported goal, a U.S. official said.
Obama has been quite successful in cutting US CO2 production (CO2 is a valuable resource for agriculture). Just ask the unemployed and those who have left the workforce.
The passengers shoule all wind a giant rubber band by themselves to make the propeller spin.
The POTUS supports the reduction of emissions from US airlines and is doing his best to impliment them by undercutting the US economy.