Green Technology
Green technology is technology that produces clean energy, helps repair environmental damages or offers solutions to wasteful practices.
Study Says Solar Panels on Half of Roofs Could Meet World's Electricity Needs
Sweden Is Great at Turning Trash to Energy
Mini Turbine 'Wind Trees' Could Generate Power for Homes, Electric Cars
Could We Use Moon Dust to Block the Sun and Help Cool Earth?
How Sinking Carbon-storing Seaweed Can Help Fight Climate Change
Donate Your Hair to Help Keep Our Water Clean
Sweden to Build First Electrified Road for En-route EV Charging
A New Green Solution for Dyeing Blue Denim
'The Fighting Women' of Africa Collect Plastic to Build Schools
Learn More / Page 3
Left unchecked, friction between the moving parts of an engine would turn it into an inert piece of sculpture. Clean, filtered oil keeps the parts moving with relatively little resistance.
Ever wish the lawn would just mow itself? Well, the Husqvarna Automower is about as close as you'll get to that dream -- with the added bonus of using the sun for power.
A little friendly competition never hurts to stir up motivation, right? That's the idea behind Tweet-A-Watt, a power-monitoring gadget that connects your power usage to your Twitter account.
By Julia Layton
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From toothbrushes to iPhones, we fill our lives with a seemingly unending string of gizmos -- all of which depend on electricity to give us what we need to make it through the day. What if you could generate that power?
By Robert Lamb
Sure, your hair dryer or toaster sucks up a lot of kilowatt-hours during the short time it's on, but what are the truly big drains on your home energy budget?
By Julia Layton
While rebates and tax credits have put solar power within reach for many homeowners, it's still an expensive undertaking. How do you make sure you get your money's worth?
By Julia Layton
A 10-minute shower can seem like nothing on a cold, sleepy morning, but it might cost you 50 gallons of water (or more). Is there a way to limit the volume of water you use?
By Julia Layton
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The Duke Smart Home isn't your typical residence hall. It's a live-in laboratory, complete with LEED Platinum certification. What's inside (and out) that makes it so special?
There are two main ways of generating energy from the sun. But one -- solar thermal technology -- is really poised to take off as a clean, reliable form of alternative energy.
Did you ever make a potato clock as a kid? If so, you already understand the basic principles that make a soil lamp work.
By Julia Layton
Energy efficiency is starting to rank right up there with speed and power in terms of desirable attributes for a computer. What are five of the most energy-efficient computers on the market?
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The Northeast Blackout of 2003 left millions without power and cost approximately $6 billion. Experts believe we can avoid future blackouts by storing energy along the U.S. electric grid.
Why would Los Angeles and Pittsburgh set out to convert a combined 180,000 traditional high-pressure sodium and mercury-vapor street lamps to LED lighting?
How much energy does your TV use when it's plugged in all night? How much power is your stereo system draining from the socket monthly? The Kill A Watt and other energy monitors help you find out.
By Julia Layton
Cellulosic ethanol can be made from any old stem, leaf or tree trunk. Farm wastes, grass clippings and recycled newspaper will work, too. So when can we expect this alternative fuel to arrive at gas stations?
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Children love to play, so why not harness the energy of their motion to help support a community. How does the PlayPump convert the push of a merry-go-round into clean water?
Gasification could represent a second chance for coal. Will this old technology, which can run on coal or biomass, get a new life as one of the most important energy alternatives of the future?
Sometimes you need to reinforce roads or retain walls without breaking out the concrete and rebar. That's where a simple, ingenious technology comes in.
By Julia Layton
That's not just any mud. That's a fossil fuel that's stashed away in huge quantities in deposits all over the Earth's crust. Could that frozen fuel also heat up the planet?
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Alternative energy usually means something is mined, refined, collected or grown. But gravity-powered floor lamps rely only on a force of nature -- and the strength of a human being.
By Julia Layton
Photovoltaic solar panels are like windows -- they build up a coating of grime that requires a good cleaning from time to time. What's the alternative to climbing the roof with a squeegee and bucket of suds?
Solar energy is clean and plentiful. There's one big problem, though: The sun doesn't shine all the time. Is there a way to keep solar plants powered up through the night?
By Julia Layton
You know what geothermal energy is -- heat from the Earth. Could a new twist on geothermal power help countries achieve energy independence?
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Without a doubt, plastic is useful. It's also everywhere — filling up landfills and recycling bins. These 10 twists on the common polymer are trying to change that reality.
Plants produce energy so perfectly: converting sunlight, carbon dioxide and water into power and emitting nothing harmful in the process. Can we imitate such an elegant system?
By Julia Layton