Are solar-powered trash cans a fuel-saving, money-saving way to keep the streets clean? Or are they worse than regular trash cans?

They actually might in certain cases, using off-peak power at peak times.

Born out of first-hand research in a Lima slum, this time and water-saving device is targeted at families that live without electricity or running water.

Morocco is making good on it's stated goals of increasing renewable energy development, leading towards 40% of electricity from renewables over the next decade.

The Grand Inga dam will be double the size of China's Three Gorges, but big questions remain about whether ordinary Africans will actually get its electricity.

The latest figures from the EIA show renewable energy sources overtaking nuclear power in the US, through the first nine months of 2011.

Hydroelectric power is an easy choice to make if you have access to a stream or river, but this concept takes advantage of the streams running through our walls: our plumbing.

Think you need to be an engineer and spend a bundle to create a mini-hydropower generator? Think again.

Emissions from tropical hydropower dams in Brazil are up to four times higher than often assumed, new research shows.

Using the flow of water inside the pipes to power the water network's own monitoring devices could eliminate the need for batteries in those systems.

A new type of hydrokinetic turbine sits within irrigation canals and could power several homes from the flow of water.

World hydroelectric power generation has risen steadily by an average 3 percent annually over the past four decades.

A new study published by The Proceedings of the National Academy of Sciences serves as a great example of the interconnectedness of nature and how human activity can disrupt life-sustaining systems.

Just float the device in a river or stream and soon enough you'll have enough juice to charge a smartphone, GPS or other device.

A man named Manfred Mornhinweg found the modern world too "noisy and hectic", so he decided to build himself a house on a quiet 40 hectare piece of land in Chile.

A travel writer captures the beauty of Iceland's wilderness, but will these natural wonders exists for much longer?

A new technology developed by Korean researchers could generate electricity from the the motion of water in our toilets as well as rivers and streams, even rain drops.

For backpackers wanting something other than solar power.

A mix of wind, solar and hydro power could replace fossil fuels in every country in the world.

The project will take advantage of the sun, mountains and sea.

Take one Estream and add moving water for clean, quiet, offgrid energy.

We used to be able to justify burning a bit of fossil gas, but we cannot anymore.

The timeline needs some work. But this is a start...

With the cost of cement electric power poles and

The kit includes an LED headlight and tail light and a rugged case that attaches a smartphone to the handlebars.

Researchers have developed a chip that can run off the low voltage deep within the inner ear.

Northern Arizona University student from a range of departments built the charging station piece-by-piece to educate fellow students on the energy used by their gadgets.

The removable insole that's now on Kickstarter can fit into almost any kind of shoe.

The researchers have developed a fuel cell that creates electricity from urine and could be used to power our gadgets.

A piece of classic playground equipment gets a clean tech makeover.

A new technology developed by Korean researchers uses ultra-thin, flexible materials to generate electricity from body heat.

A community soccer field in Rio de Janeiro stays well lit at night thanks to energy harvesting tiles laid under the turf.

The shiny sticker generates energy from movement.

The same inventor who brought us the body heat-powered flashlight is at it again.

The small device is perfect for tiny homes or those wanting a convenient, yet electricity-free option.

Forget plugging in your phone to charge, soon the battery could stay topped off from swipes and typing.

The city council has begun installing solar-powered lights around the streets of downtown Nairobi.

The estimated 80% of Kenyans that are not on a grid rely solely on kerosene to light their homes. But a pay-as-you-go home solar system promises to deliver clean, affordable lighting to rural areas.

There are worse places to be stuck than in Hawaii... I'm starting to think they did it on purpose!

Solar City and Tesla take the Kinks out of solar power with plenty of PowerPacks

Nuclear power generation in the United States is falling. It plateaued between 2007 and 2010—before falling more than 4 percent over the last two years. Projections for 2013 show a further 1 percent drop.

Nuclear power is so controversial; an engineer working on the Bruce Nuclear plant gives his point of view.

Instead of building giant concrete buildings filled with uranium, why not build smaller energy-efficient buildings filled with people.

No they don't. Whether or not you buy into this study, the fact remains that cars are cars are cars.

It would be hard to find a cooler looking vacation home than one of these cabins...

These spikes might be intermittent. But they are getting bigger and more frequent.

I am sorry, they are a dumb idea, and the data prove it.

The material can also heal itself to keep medical devices running indefinitely.

The data center will be the largest in the world.

The technology could lead to cheaper hydrogen cars in the future.