Green Technology

The world flushes up to 20 percent of its drinking water down various drains. That's a lot of water going to waste. Waterless toilets could squelch the squandering.

By Susan L. Nasr

Solar energy is abundant and infinitely renewable. Therefore, it's not surprising to see the proliferation of devices that rely on the sun -- especially solar aircraft.

By Susan L. Nasr

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.

By Susan L. Nasr

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

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.

By Maria Trimarchi

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

We live in a universe of clocks. The technology may not sound as dependable as your cell phone alarm clock, but humans have turned to water-powered clocks for more than three and a half millennia.

By Robert Lamb

Hair trimmings from salons and personal donations can be repurposed as mats that soak up oil spills and help protect the environment.

By Patrick J. Kiger

As far back as 1500 B.C.E., people were trying to purify water to make it drinkable. And we're still at it. Today inventors use tools as simple as clay and as sophisticated as carbon nanotubes to bring clean water to the world.

By Patrick J. Kiger

Wine pomace - the portion of grapes left over from winemaking - has a variety of uses, from fertilizer to a nutrition-enhancing ingredient in foods.

By Patrick J. Kiger

The controversial technology of reflecting sunlight away from the planet could help blunt the worst impacts of climate change. Harvard University climate scientist David Keith weighs in.

By Betsy Mason

Coral grows faster when it's cut or broken and scientists are taking advantage of that to replenish depleted reefs.

By Cherise Threewitt

Sweden puts less than 1 percent of its household trash into landfills, in part because it burns nearly half to generate heat and electricity.

By Patrick J. Kiger

From the chemicals that pollute and the massive use of water, the traditional method of dyeing blue jeans is an environmental disaster. Nanoparticles made from wood pulp might be the answer to the problem.

By Jesslyn Shields

There are seven different numbers you might see on a plastic container. And each number has its own meaning.

By Melanie Radzicki McManus & Desiree Bowie

If you turn off the lights in your computer room, you'll probably see the glowing eyes of vampire electronics peering back at you. A smart power strip can help you cut down on how much energy they waste.

By Nathan Chandler