On that subject, I'd like to mention that these are perennial crops, crops that require few inputs. This is very promising from an environmental standpoint. The perennial crop, switch grass, grows on its own. It will be planted there for 10 years or more. This is very positive environmentally. One tonne of switch grass can remove up to 22 kilos of CO2. Since it uses few inputs and controls soil erosion, it is a highly accepted crop from a social standpoint.
On April 20th, 2010. See this statement in context.