Cattle are the biggest source of greenhouse gases, accounting for more than three-quarters of all emissions from global livestock, a survey shows. The assessment, described as the most detailed of its kind, identified Europe and the Americas as the world's epicentres of beef production. via Pocket http://www.bbc.co.uk/news/science-environment-25416050#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa
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