According to the Energy Information Administration, Americans use nearly 400 million gallons of gasoline every day. In the face of resource depletion and climate problems, renewable fuels are needed to replace fossil fuels. Currently, biofuels are complex to create, and their economic viability is uncertain. Open the panels to view more information.

Sources: U.S. Department of Energy, The Biomass Research and Development Initiative, The National Renewable Energy Laboratory, The National Ethanol Vehicle Coalition, Renewable Fuels Association
Graphic by Monica Ulmanu.