I think when it comes to meat, computing and many other things, moderation is the way to go and is even better than abstinence. Yes it's much more difficult to do since it's hard to draw a line somewhere and you don't get the "victory" of quieting completely, but I think in a way moderation is a greater achievement, since you're able to indulge yourself a bit while restraining yourself. Plus I'm confident in that there's very much diminishing returns with abstaining from something, both in terms of the individual and the world as a whole. For example with meat. If everyone reduced their meat consumption to 1-2 serving a day, I bet it would be a massive benefit to the environment, however having everyone go vegetarian from there probably wouldn't lead to much more environmental benefit.