There is an opportunity to use agricultural by-products, such as grasses, hay, and straw. The difficulty is that they tend to have a higher amount of chlorine in them, which causes corrosion in the boiler systems. They also have a higher amount of ash, which causes some disposal problems. It tends to be a bit more difficult to collect that material.
We're certainly supportive of trying to use it. Where straw or an agricultural type of pellet is used, it is usually at a lower proportion. Usually some wood has to be mixed into it to keep the ash property of the fuel down, but definitely there is an opportunity to use that agricultural biomass.