Sustainability

These big cats are in crisis.

Get a bird's eye view from Hawaii to New York.

His plan to buy SolarCity and replace fossil fuels comes at a tough time for both companies.

The White House says it wants to bring 1,000 megawatts of solar power to lower-income Americans by 2020, a ten-fold jump.

Elon Musk wants to buy a company he helped start.

Better stick to home solar for now, green energy fans.

'Valen's Reef' gives viewers an immersive look at the Bird's Head Seascape, "the epicenter of marine biodiversity."

Expect a massive deployment of renewable energy worldwide through 2040, a new report finds.

Solar Impulse 2 landed in New York City after a long flight from Pennsylvania.

The illegal trade of wildlife is a much larger, far-reaching issue than you might realize.

How a nondescript village in India is harnessing solar power to transform the lives of illiterate women around the globe.

Sometimes your selfie isn't worth it.

A Florida brewery is shunning plastic rings entirely, replacing them with a biodegradable version made from natural brewing byproducts.

The project will generate enough electricity to power 8,000 homes.

"Efficiency and cost -- they're everything that matters."

A two-year investigation of electronics recycling revealed that about one-third of the devices were improperly exported to developing countries.

Hermione would.

It doesn't take a Little House on the Prairie to grow a beautiful, sustainable garden.

Renewable energy in action.

Think before you toss!

Making homes smarter about energy.

Now, the only people who drink animal protein are, like, your parents.

Bill Gates has said the world needs an energy miracle. We may already have found multiple miracles.

Travel to the Amazon without leaving the couch.

Carbon emissions stayed flat for the second straight year.