OK, the headline is a stretch. However, it is true that air travel puts large amounts of carbon dioxide, nitrogen oxides, sulfur oxides, soot, and even water vapor directly into the atmosphere, all of which makes an inordinate and unsustainable contribution to global warming. And academics do fly — a lot. As the environmental writer and activist Mark Lynas argued in the New Statesman: "Probably the single most polluting thing you or I will ever do is step on a plane."
Chronicle of Higher Education 25 Jan 2008
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