Airlines and Differential Environmental Impact

Airlines differ widely in the amount of emissions per person per flight, as reported on Treehugger, depending on the age of the plane, the amount of space used for first class or business class seats, and how full the airline keeps the flights. Economy class seats, unsurprisingly, are much lower in their environmental impact than first class ones.

And now, Travel Analytics will allow you to calculate the airline with the lowest carbon footprint for the route you want to fly. If taking the bus isn't an option, check out airlines here before you book your ticket.