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BBC NEWS | UK | Magazine | The methane makers
Does it make sense to you that cows contribute to global warming by producing greenhouse gases?
Does it make sense to you that cows contribute to global warming by producing greenhouse gases?
The author of the 2006 Stern Review into the cost of climate change attacked the "enormous pressure" meat production puts on the world's resources and said people were becoming increasingly aware about "low carbon consumption".
As the diagram above shows, methane emission is dramatically higher in cows (primarily from belching) than other animals. But cutting back on eating meat is not the simple answer, say scientists.