Cameron Diaz on the film set for 'What Happens in Vegas'. New York City, USA - 31.08.07

Environmental campaigner Diaz is pictured alongside a polar bear on the front cover of the publication's October (07) issue.

And the 35-year-old uses her new editor role to give the magazine's young readers some green tips.

She writes: "I wash the plastic wrap after I use it, but I also do things like put a plate over the bowl instead of plastic wrap.

"I just figure out how to do things differently so it's better for the environment."

Source: WENN