Biofuels are often brought up when discussing the use of renewable energies to protect the environment and reduce carbon emissions. However, a very controversial aspect of biofuels is that the base materials for their production are often staple crops and woody plants. Growing staple crops for biofuels takes up existing arable land, and food prices may also experience sharp increases from time to time as biofuel producers compete with the general populace for the same agricultural commodities. ... more
