One more link on the connections between meat eating & global warming, the UN report Livestock's Long Shadow:
LEAD digital library: Livestock’s long shadow - Environmental issues and options
Really, if you consider that it takes 16 pounds of grain to make 1 pound of meat, and you think about all the fuel used in raising & shipping the grain, let alone all the other factors (see above report or at least the executive summary), it's obvious that meat consumption is a huge part of the problem. Not the only part, and maybe not exactly 99%, but a huge part nonetheless.