Livestock farming already occupies 30 percent of the world's surface, according to the United Nations

A scientist in the United States has questioned the impact meat and diary production has on climate change, and accused the United Nations of exaggerating the link.

In 2006, a report published by the U.N. Food and Agriculture Organization (FAO) titled “Livestock’s Long Shadow,” claimed meat production was responsible for 18 percent of greenhouse gas emissions, which it added was greater than the impact of transport.

Livestock farming already occupies 30 percent of the world’s surface and its environmental impact will double by 2050 unless drastic action is taken, the U.N. warned.

Environmentalists and leading campaigners including Paul McCartney, used the findings to urge consumers to eat less meat and save the planet. Last year the former Beatle’s much hyped-campaign featured the slogan: “Less meat = less heat.”

Read more… (CNN)