Wind Power - September 28, 2009 03:00 PM
Humans have harnessed the power of wind for thousands of years. It bore sailors in boats across vast oceans, and enabled medieval farmers to mill grain and irrigate crops. With modern technology, wind power is a viable and reliable form of alternative energy. Learn more about wind power in this guide, including how it's created and where it's used.
Solar Power - September 28, 2009 02:55 PM
Burning at about 10,000 degrees Fahrenheit on its surface, and 28 million degrees Fahrenheit at its core, the sun is a self-sustaining and reliable producer of immense energy. The idea of capturing this energy and converting it into electricity has led to a long series of scientific innovations since the “photovoltaic effect” was first discovered in the mid 1800s. Learn more about how solar power works with the sites below.
Hydropower - September 28, 2009 02:49 PM
Hydropower traces its roots to the water wheels used by ancients Greeks to grind wheat into flour. Today, China’s Three Gorges Dam is the largest electricity-producing power plant in the world. By harnessing the power of rivers and oceans, scientists have been able to create a sustainable energy source from water. Read on to learn more about hydropower.
Hydrogen - September 28, 2009 02:40 PM
Hydrogen is the most common gas found in the universe. By weight, hydrogen has highest energy content of any standard fuel. Though hydrogen-powered vehicles are already on some roads, researchers continue to look for more cost-effective ways to make the fuel. Learn more about the energy potential of hydrogen on the Web sites below.
Geothermal Energy - September 28, 2009 02:32 PM
Like the more conventional energy resources, alternative energy can also come from underground. Geothermal energy refers to energy generated from heat contained within the Earth. The Web sites in this section discuss geothermal energy in great detail.
Biofuel - September 28, 2009 02:11 PM
Used primarily to power automobiles and heat buildings, biofuel is a type of fuel derived from newly deceased organic matter, instead of ancient organic matter, as is the case with fossil fuels. This growing industry has made headlines recently as new technology is developed, and as biofuels are adopted more widely. Learn more about biofuel, including biodiesel and ethanol, and how it is powering many vehicles today.
Alternative Energy - March 06, 2009 10:28 AM
Worldwide, researchers and policymakers have focused on finding alternative energy sources to supplement conventional energy. Use the Alternative Energy Web Guide to learn more about alternative energy sources and how the United States is supporting new research.