Or eating meat. Or drinking milk. Or eating cheese. or eating corn. Or the thousand and one little things that you can do to vote with your wallet. And remember the point of the exercise doesn't have to be to stop doing it completely, but to do less of it and to consider whether you really want or need that. It's a far cry between maybe ordering the 8 oz instead of the 12 oz steak versus burning your house down and knapping flints for the rest of your days.