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Alternative Energy

More About Alternative Energy
Photo: Wadham Biomass Facility generates electricity by incinerating rice chaff

Biofuel

Turning trash into riches.

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Photo: A zinc-based metal fuel cell

Fuel Cells

The ultra-clean power source.

Find Out More
Photo: A geothermal plant and runoff pond near Reykjavik

Geothermal Energy

Power from Earth's heat.

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Photo: New Zealand's Lake Benmore, seen from the adjacent hills, provides one-third of the country's hydro-electricity (Upper Waitaki Hydro Development Scheme, South Island)

Hydropower

The energy of falling water.

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Photo: Solar powered house at night

Solar Energy

Capturing the sun's light.

See More
Photo: Dark storm clouds approach wind turbines in a roadside field.

Wind Power

Power from a breeze.

Get the Facts

Did You Know?

Using straight vegetable oil for fuel can lower greenhouse gas emissions by nearly 100 percent, greatly reducing air pollution.

More About the Environment

News: Latest Environment Stories

Crime-Fighting Leech Fingers Perp
Alligators Sing to Set Up Singles Clubs? (With Video)
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What Is RSS?

Related Features
Photo: Geoengineering

Shading the Earth

Some scientists say we need a Plan B for combating global warming: a giant sunshade that would cool the whole planet.

Read More
Photo: Large ice floes on the Southern Ocean. Ridges are caused by floes bumping up against one another, forming walls of ice.

Article: Global Warming Solutions

From increased use of wind power to elaborate systems of burying carbon dioxide, explore some of the ways humans may be able to bring greenhouse gases back under control.

Learn More
Photo: Corn

Photo Gallery: Biofuels

Producing fuel from corn and other crops could be good for the planet—if only the process didn't take a significant environmental toll. New breakthroughs could make a difference.

See the Photos
Photo: A futuristic solar installation doubles as public art

Article: But Does It Come in Solar?

Solar heating has been used for thousands of years to warm dwellings from humble cottages to elaborate palaces. Find out about some of the ways you can use it today.

Learn More
Photo: Icebergs in the Gerlache Strait

Quiz: Global Warming

Global warming is a complex issue that involves many different environmental factors. Think you know the ins and outs of global climate change?

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Global Warming Topics

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Photo: Glass of water

Take Quiz

Test your water knowledge.

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Photo: 2009 Winner

Photo Contest

Find out who takes home the Grand Prize!

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National Geographic Kids

Image: A cross-section of the human head

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