• [2013-12-16] New global study reveals how diet and digestion in cows, chickens and pigs drives climate change 'hoofprint'
  + http://www.sciencedaily.com/releases/2013/12/131216154900.htm + http://www.pnas.org/content/110/52/20888 + http://news.mongabay.com/2013/1219-hance-cattle-climate.html
  in Tietoukka Monitor > 2013 > 2013-51 with agriculture egg_production feed_efficiency greenhouse_gas_emissions livestock meat_production milk_production

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