A fun take from the currently defunct SlateStarCodex was buying "offsets" for activities you wanted to support. Carbon offsets for plane trips already exist, in

A fun take from the currently defunct SlateStarCodex was buying "offsets" for activities you wanted to support. Carbon offsets for plane trips already exist, in the range of $30 to $150 or so. In theory, you could find someone who normally eats meat and offer them some amount of money per day to be vegetarian/vegan (or, find two people and pay them to halve their meat intake, or whatever). This might satisfy a moral obligation while costing you in a currency that you're happier to spend. The obvious argument is "why not buy offsets and then also not do the bad thing for 2x effect". I don't think anyone's morally obligated to buy carbon offsets arbitrarily even if they're not flying, and similarly, maybe people aren't obligated to not do the bad thing either? But this gets into the weeds of moral obligation in general, which is probably a complex topic. Suffice to say, while buying an offset might cost some amount of money, not eating meat is ~free, and that's a trade some people may be willing to make if they're feeling obliged to reduce meat production too.