Ambient noise can help mask sounds at night, but pink noise and brown noise may help you more than the white noise you've always heard about.

Air pollution is so pervasive it even affects babies in the womb and causes long-term mental and physical health problems.

Experts say we make it easy for germs to invade by touching our eyes, nose and mouth.

Here's a breakdown of how each disinfectant kills specific types of germs.

Utility-scale solar power requires a lot of land. But there are ways to work around that problem.

They're baaack ... nearly 30 years later, solar panels are once again gracing the roof of America's most famous neoclassical mansion.

Walmart is making big strides when it comes to renewable energy.

Deserts have a lot of sun, but not much water. That's why researchers are advocating combined solar and agave farms.

With the purchase of New Mexico's largest solar facility, the long-term partnership is nearing 300MW of installed solar power.

Hydroelectric power has not received the attention that solar and wind enjoy, but that could be changing.

Renewable energy has made great strides in the U.S. recently. But if you take a look around the globe, you'll find equally encouraging signs.

Learn some of the lessons serial entrepreneur Hugh Whalan has learned in the 7 years he’s been working on renewable energy in the developing world.

How hip to hybrid cars are you? Zero to sustainability: Test your hybrid car IQ with this quiz.

Clean energy sources are producing record amounts of power in markets across the world.

After the 2007 Burning Man, volunteers repurposed a solar array for a local school. That installation led to many, many more.

In rural areas, Internet connectivity can be a powerful force for economic empowerment.

Breakthroughs in artificial photosynthesis could help harness the sun's power for clean, efficient production of liquid hydrogen.

New documentary from the director of 'Fuel' and 'The Big Fix' offers real alternatives to fossil fuels.

Israel’s largest international green energy conference takes place this weekend in Eilat.

The island nation is using its natural and cultural resources to attract filmmakers from around the world.

Better technology and more accessible data are helping drive new change.

The concept shoe is reminiscent of the electronic-laced shoes from the 'Back to the Future' movies.

Increased renewables, decreased emissions and falling energy prices. Germany's ambitious energy plan may be starting to pay off.

Thousands of drilling rigs are idle and roustabouts are being laid off. Why not put them to work drilling for renewable energy?

Corporate renewable energy goals that once looked ambitious are being met much earlier than expected.

Australian teen's invention could help make clean water easy and affordable to access.

The conceptual Dutch Windwheel takes the term 'mixed-use development' to dizzying new extremes.

Fom Argentina to Mexico, solar in Latin America is likely to grow like gangbusters in the coming years.

These are the largest towns in America with the smallest environmental footprints.

Kerosene lanterns are dangerous, polluting and unhealthy. That's why one charity aims to eliminate them by the end of the decade.

Build enough Powerwall batteries and you can run the world on renewable resources.

An award-winning MIT team has created a portable, solar-powered desalination system that could provide freshwater in remote locations.

The Swedish furniture giant is spending staggering amounts on renewables and climate adaptation, putting entire countries to shame.

Technology could be used to generate electricity or even propel tiny toy cars.

Developers hope the design will bring affordable lighting to people worldwide who live along the coast.

With the power of 5,000 suns, the real engineering breakthrough with the Solar Sunflower might be its cooling system.

The WindChill uses biomimicry to help preserve food in rural areas without access to electricity.

U.N. task force looks at turning one big problem into an energy resource.

No outlet needed for this lamp — just plug it into the nearest plant.

The same thing that keeps the lights on and appliances humming tastes great on a cracker.

Although solar panels do most of the heavy lifting, so to speak.

Efficiency isn't sexy, but it gives you a lot more bang for the buck.

Wave power has the potential to supply 25 percent of the nation's energy.

Tyer Wind has based its proposed wind turbines on a hummingbird flapping its wings.

Norwegian cruise operator Hurtigruten is instituting a plan to power its ships using dead fish, part of an effort to be more environmentally sound.

Scientists are working to harness the power of the static electricity to power our devices. It's a surprisingly mysterious natural phenomenon.

By 2020, onshore wind and solar power are expected to be cheaper sources of new electricity than any fossil fuel.

Advanced methane capture could make a significant dent in U.S. energy demand.

Hi-tech biomass gassification plant will cut Middlebury College's CO2 emissions by 40 percent.

Connecticut inventor and tinkerer Dave Nichols thinks cars should run on biomass. He just might just be on to something.