> Emissions data for flight connections was sourced from atmosfair.de They probably just copied part of data over. The calculator on Atmosfair's site seems to

> Emissions data for flight connections was sourced from atmosfair.de They probably just copied part of data over. The calculator on Atmosfair's site seems to be more detailed – more airports (RDU works, and you can even input multi flight trips), selectable plane model & class. https://www.atmosfair.de/en/offset/flight https://www.atmosfair.de/en/offset/flight