Raising animals for meat -- global warming?

The last few months have seen a series of reports, articles and remarks on the issue of raising animals for meat and global warming. In November 2006, the United Nations Food and Agriculture Organization (UNFAO) issued a report concluding that the raising of livestock generates more greenhouse gas emissions than all forms of transportation combined. Even Al Gore has been targeted as being “Too Chicken to Go Vegetarian?”. An issue which will certainly resurface in the next few months... What do you think?