Articulo scientificuo da usarsi con quelki che dicono: "1 kg di carne consuma un trilione di litri d'acqua", ecc.

"Livestock: On our plates or eating at our table? A new analysis of the feed/food debate"


http://www.sciencedirect.com/science...11912416300013

Highlights

• 86% of the global livestock feed intake in dry matter consists of feed materials that are not currently edible for humans

- Contrary to commonly cited figures, 1*kg of meat requires 2.8*kg of human-edible feed for ruminants and 3.2 for monogastrics

• Livestock consume one third of global cereal production and uses about 40% of global arable land

• Livestock use 2 billion ha of grasslands, of which about 700 million could be used as cropland

• Modest improvements in feed conversion ratios can prevent further expansion of arable land dedicated to feed production.