Paul McCartney to Laurie David

Some interesting facts from Laurie David, reflecting on a conversation with Paul MaCartney on vegetarianism.

The report found that 18 percent of global warming emissions come from raising cows, chickens, pigs, turkeys and other animals we eat. That's 40 percent more than all the world's cars, SUVs, airplanes, and other modes of fossil-based transportation, which combined account for 13 percent.

The UN report details how 70 percent of the Amazon rain forests have been cut down for grazing, and fully one-third of the planet's arable land is now used for growing feed for livestock. The UN predicts that global meat production will more than double by 2050 to keep pace with increasing demand.