Schwarzenegger has been teaming up with WildAid, along with director James Cameron and Chinese movie star Li Bingbing, to encourage people to eat less meat for the sake of the climate.
"People always ask, 'what can we do about pollution?'" Schwarzenegger writes on Facebook. "One quick fix - eat less meat. I've cut back, so I know you can."
The meat and dairy industries emit more greenhouse gases than all the world's transportation combined. Greenhouse gases at the earth's atmosphere trap heat and make the planet warmer, causing sea ice to melt and ocean levels to rise. Fifteen of the 16 warmest years ever recorded have occurred since 2001.
No wonder the Terminator is speaking out. Schwarzenegger has also produced and starred in a new show on the National Geographic Channel, "Years of Living Dangerously," to help raise awareness about the perils facing our planet.