An oft-quoted way to reduce one's Carbon footprint is to eat less meat. I believe there is even a day of meatless meals that is planned, presumably as an awareness campaign, every year. However, I have an issue with this thinking: the meat I'd buy is already in the store in the first place. Its Carbon emissions are largely...emitted. Is it true that making a personal choice to, say, eat one less meat meal per week will actually affect global Carbon emissions, or is it just a feel-good measure to reduce my personal Carbon footprint without actually reducing the amount of Carbon released?