federal aviation administration, Tag

Photo via Shutterstock Sometimes it seems like air transportation is the last to catch up with energy innovations. Busses, cars and trains regularly run on a variety of green options. But airplanes, with a few exceptions,...

This study from Yale University  seems contradictory to what we know about aerosols. Generally more aerosols like SO2 cool the climate, but in this case they are saying “it’s offset by the cooling effect of nitrate...