Alternative Energy, Biofuel Issues

Diesel fuel is made from crude oil, a nonrenewable resource. Biodiesel fuels are characterized as substitutes for diesel, but not all biodiesel fuels are clean and renewable. Renewable biodiesel can be made relatively easily from used vegetable oil.
Other possible sources include locally grown cellulosic materials such as switchgrass, straw, hemp, and algae. The B number indicates how much biodiesel is in the mixture. For example, B2 is 2 percent biodiesel, 98 percent petroleum; B100 is 100

Read more ...