The Gulf’s Growing ‘Dead Zone’
The Gulf's Growing 'Dead Zone' By Bryan WalshTime.com; June 17, 2008http://www.time.com/time/nation/article/0,8599,1815305,00.html The American Midwest is essentially the granary of the world, supplying corn, wheat and other crops to markets from Chile to China. But all that food doesn't grow by itself. In 2006 U.S. farmers used more than 21 million tons of nitrogen, phosphorus and [...]