The Atlantic has a terrific report on financing sustainability:

When the Internet boom busted a few years back, venture capital in the United States went hunting for the next big thing. “Clean tech” quickly replaced high tech as all the rage. VC firms began to bank on healthy returns from cutting-edge companies dealing in alternative energies and other grand environmental solutions. While the verdict is still out on the wisdom of this shift, one thing is certain: the largesse is finally trickling down to sustainable agriculture. – from the Atlantic