True. When you grow corn or you grow any crop, you use herbicides, pesticides, and fertilizers. The fact of the matter is that the use of those agents for growing crops has been reduced significantly over the years through policies of government, through land management programs, but also because of the advancement of technologies in nitrogen fertilizers. Those fertilizers have been reduced significantly over the last 10 years going into growing crops.
On a net basis, though, ethanol and biodiesel are renewable fuels that reduce greenhouse gas emissions. If there are increased uses of nitrogen in growing corn because you're growing more corn, that's undeniable, that's a fact, but the fact of the matter is that the trend is away from using more fertilizer.