There are dozens of celebrities campaigning to fight global warming, but Paul McCartney's take on it is a first for us! He wants everyone to go vegetarian for the cause. According to a 2006 United Nations report, cattle-rearing generated more greenhouse gases than transportation.
Paul says, "I would urge everyone to think about taking this simple step to help our precious environment and save it for the children of the future.
"It's very surprising that most major environmental organizations are leaving the option of going vegetarian off their lists of top ways to curtail global warming."
That's because Americans can't go without burgers and steaks forever!