ECONOMICS - Banks Put a Price on Earth's Life Support

It is not easy to put a value on an intact forest, a clean river, or unpolluted air, but that is what a group of the world's biggest banks is attempting to do. They have agreed that the present economic system uses and often destroys the environment without paying to do so. And that, they say, is not sustainable.

http://www.scientificamerican.com/article.cfm?id=banks-put-a-price-on-