Should Al Gore become a Vegan?

Al Gore is a huge, if not the biggest, champion of the fight against global warming. He did get the Nobel Peace Prize for his actions As the U.N. has stated “Raising animals for food, the report said, is “one of the top two or three most significant contributors to the most serious environmental problems…” To read more about it download this pdf.
So my question, raised by a video I watched on Youtube, is Al Gore a hypocrite if he is not a vegan or at least a vegetarian? Or has he raised enough awareness and caused enough people to shrink their carbon footprint enough to offset his meat diet?