Image description: Scientist Dmitry Polyansky examines a vial containing a specialized catalyst designed to help convert solar energy into fuel. Producing clean-burning hydrogen fuel from just sunlight and water requires custom-built catalysts for water oxidation — the part of the water-splitting process that generates oxygen atoms. A tiny amount of the solid catalyst, developed in collaboration with the University of Houston, dissolves and turns the water that lovely shade of blue.
Photo from Brookhaven National Laboratory.
Learn how you can save energy at home with the interactive Home Energy Saver:
Fall is a good time to look at your home energy use. This calculator can help you find places to save.
Image description: This graphic describes the sources of electricity generation for the United States in 2011. Coal provided 42 percent of electricity, followed by natural gas at 25 percent, nuclear power at 19 percent and renewable sources at 13 percent.
Of renewable sources, hydroelectric power (mostly from dams) lead the way at 63 percent. Learn more about the use of renewable sources of energy in the U.S.
Infographic courtesy of the U.S. Energy Information Administration.