It’s not about religion, I am too afraid of picking the wrong denomination to ever choose just one. I can already imagine how ripped off I would feel if I lived my whole life by some strict code, to get turned away at the pearly gates (or equivalent) by a technicality! “You’re kicking me out for eating bacon?? Hey, my heaven includes bacon!”
While it is a great reason to reduce meat intake, the environment isn’t my reason. I am reducing intake of all animal proteins (including fish), not just the ones that chew up hectares of land and resources to produce.
It isn’t an ethical concern, since I can’t see where to draw the line on animals, insects or plants. Does the tasty cow deserve to live more than the yummy escargot? And we’ve all seen Avatar; how about plants??
So that leaves health, and yes that is the reason. I’ve read a fair bit of research that points to animal protein –not the common villain, fat– as the root cause of heart disease and many cancers. Completely eliminating meat is supposed to be the idea solution, but many health benefits can be gained by significantly reducing the intake to levels much lower than the typical North American diet.