User blog comment:Craiglpalmer/Global Goals: Why We're Telling Everyone/@comment-252417-20150926225535/@comment-1038387-20150926230557

I wouldn't call meat eaters evil, but it's a painful fact that the meat industry is incredibly inefficient. A whole lot of food needs to go in an animal to rear it (more than it will ever produce), it poops out a lot of methane, has very little practical value during its lifetime (since milk and meat production are split), many parts aren't even used, the farms take up space that could (potentially) be used for agriculture, it's labor intensive as most of the rearing cannot be done by robots, and probably more.

Unfortunately, the most drastic (non-vegetarian) solutions - expanding laboratory grown meat and eating bugs - have a huge PR problem.