Treibhausgasemissionen: Finnlands Finnair und TAP aus Portugal sind die "saubersten" Fluggesellschaften weltweit. (WK-intern) - Passagiere können die Emissionen berücksichtigen, wenn sie ihre Reisepläne  arrangieren. Finnair found to be cleanest airline in new study Finland’s Finnair and TAP Portugal have emerged as the two least polluting carriers in a study of 20 of the world’s biggest airlines. A study of the greenhouse gas emissions produced by the airline industry from 2007 to 2014 revealed none are showing a significant reduction over the seven years for those that provided the data. In the study Finnair had the smallest carbon footprint in 2014, with TAP Portugal and Virgin