According to the Australian Greenhouse Office, the most important gas causing gobal warming is methane which is 21 times more powerful than C02.
The number one source of methane gas in the world is animal agriculture, which produces 100 millions tons of methane a year. That translates to 30% of the greenhouse emissions.
By becoming a vegetarian people could reduce greenhouse gas emissions by 30% and significantly reduce global warming in our lifetimes. In addition, with the freed up land being returned to native forest, we could also extract carbon from the atmosphere equal to the other 70%! That’s a significant reduction at no cost.
For all the data, read this http://www.earthsave.org/news/earthsave_global_warming_report.pdf
