Millions of black 'shade balls' float on the surface of reservoirs, slowing evaporation.

The Minewater system pulls geothermal heat from flooded abandoned coal mines.

Shafts that haven't been closed could be transformed into geothermal boilers to produce heat and hot water for nearby communities.

Geothermal heating and cooling systems are a blend of the old and the new. An ecologically and financially-efficient option.

In North America alone, there is enough energy trapped beneath the Earth's surface to produce 10 times as much electricity as coal currently does.

The eco-friendly boutique hotel is located in Napa Valley.

Transition to clean energy meant to provide a proof of concept to other island nations in the Caribbean.

Photographer documents the sublime landscape of a bubbling Andean geyser field.

Hot springs are generally considered to be destinations of rest and relaxation, but that's not always the case!

The newly discovered species have been isolated from other toads for 650,000 years.

Fire ants are especially efficient at filling in the ecological gaps created by humans.

Construction equipment has moved into the land of the National Butterfly Center in Mission, Texas, to begin work on a border wall.

Painted lady butterflies are migrating north for the summer, and they're overtaking southern California, to the delight of many.

Virginia Tech researchers have deciphered and codified the honey bee language with remarkable precision.

The longhorned tick, native to Asia, is first new invasive tick to be found in U.S. in 50 years.

Mosquitoes are annoying, relentless and can pose a health risk for your family. Here are some effective ways to kill them and keep them away, the natural way.

Australia's desert ants are thriving in the face of climate change.

The decline of Ohio's butterflies likely reflects a broader crisis for a wide range of insects, researchers say.

New research suggests paper wasps use facial recognition to work better alongside one another.

The western monarch population may be on the verge of collapsing.

Saving a buck while doing your part to save the Earth is a great way to mark Earth Day. Like most holidays, Earth Day presents ample opportunities to score a de

No generations in the history of human civilization have consumed as much of the planet's natural bounty as the ones alive today. So what are we doing this Eart

Retailers can't seem to let a holiday pass without building a sale around it. Fortunately, these companies' Earth Day promotions focus on eco-friendly products.

You can celebrate Earth Day all week long with free admission to any national park.

There was a time, not very long ago, when it was safe to be a politician who supported environmental causes.

Take a look at what the world's water supply would look like as a single drop - and find out what your family can do to protect it.

We asked Carla Hall, Mayim Bialik, Andy Richter, Izabella Miko about their Earth Day plans.

Celebrate National Parks Week and Earth Day with us with this breathtaking visual tour of some of the most beautiful sights in America's national parks.

Did you know that 80 percent of the known terrestrial plant and animal species are found in forests?

Meet the winners of the first California Green Medal: Sustainable Winegrowing Leadership Awards.

In celebration of Earth Day on April 22, NASA has launched a clever online campaign that enables participants to "adopt" a small piece of the planet.

Hollywood icon Betty White discusses her passion for animals and her book, "My Life at the Zoo."

Mexican president proves himself a visionary with a sense of humor at the Cancun Climate summit.

Christiana Figueres says any agreement will be a step in the right direction, but it's clear she's not convinced Cancun will be a huge step.

Taking the easy way out is nothing new for politicians, but this time they're taking the easy way out on climate policy.

In "The Passage," a family recounts past adventures and explores the meaning of kinship on a grand Alaskan journey.

Being called a bird brain really isn't an insult, now that scientists have uncovered just how smart these feathered friends really are.

As a wall goes up dividing the U.S. and Mexico, a range of environmental concerns are surfacing. Conservation photographer Krista Schlyer documents the impact.

Yellowstone grizzly bears were removed from the U.S. endangered species list in 2017.

Learn the tracks of animal species that live right next door, starting with these common neighbors.

These plants are surprisingly common, yet just one taste — or even a touch — will send you to the hospital.

Wisdom the albatross is amazing at 68 years old and still raising babies.

The Australian bilby is becoming more popular, and they may just take over as the country's animal representative for Easter.

In "Ay, Mariposa," conservation filmmakers highlight the people, animals, and fragile habitats impacted by the barrier at the border.

We label a lot of species with the shiver-inducing denizen of the night, even if they don't suck blood.

Covering thousands of miles on three-inch wings, the common green darner dragonfly completes a multi-generation journey every year.

Romeo the Sehuencas water frog desperately needed a girlfriend and a team of researchers found her along with several others.

It's the first birth spotted so far this season.

The barrage of Darwin Award-worthy and just plain cruel animal selfie photos in the news is our cue for a reality check.

Sea otters hold hands so they don't float away during naps, and baby dolphins don't sleep at all for the first months of life.