On any morning at the COP27 climate conference, you can expect a gauntlet of anti-meat protesters wearing pig and cow costumes, holding banners decrying the carbon footprint of livestock, and chanting slogans like "Let’s be vegan, let’s be free." Activist groups and corporate startups have descended on the two-week climate summit in Egypt to heap pressure on the hundreds of global policy makers there over the world’s love affair with meat and its role in warming.