When author Jack Miles calculated the carbon cost of his flight from Los Angeles to Morocco, he took into account the distance, and the layover. And then he took that number, and had to literally double it: My seats alone on the round-trip flights from Los Angeles to Casablanca (with a layover in Paris) helped…

I was inspired by Rick Steves’ book-length manifesto Travel As a Political Act. And yet, sometimes good intentions aren’t good enough. Like when your entire business is centered on glamorizing a climate-destructive activity. So what does an “ethical” traveler do? Buy offsets. Steves is now donating $30 per person he induces to travel with him…