Dan Elwell continued strategizing with his former lobbyist colleagues even after he rose up to the top ranks of the agency.
Replacing gas-guzzling planes with electric ones could put a real dent in global emissions—if we can get them in the sky fast enough.
Airlines are pushing for a global carbon market, but environmentalists say it won't be enough to prevent uncontrolled growth in aviation emissions.
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With increasing automation, pilots may be thinking about the cold cuts they're going to buy at the deli instead of focusing on the flight.
While common sense says more water by an airport means more waterfowl for planes to hit, wetland conservationists point out that not all birds contest the skyways.