From Yahoo news.

"We are at a significant tipping point," said Geri Brewster, a nutritionist at Northern Westchester Hospital in New York, who was not connected to the study.

"If people knew that they were threatening the environment by eating more meat, they might think twice before ordering a burger," Brewster said.

Other ways of reducing greenhouse gases from farming practices, like feeding animals higher-quality grains, would only have a limited impact on cutting emissions. Gases from animals destined for dinner plates account for nearly a quarter of all emissions worldwide.

"That leaves reducing demand for meat as the only real option," said Dr. John Powles, a public health expert at Cambridge University, one of the study's authors.

As a society, we are overconsuming protein," Brewster said. "If we ate less red meat, it would also help stop the obesity epidemic."

Maria Cheng

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