While some teenagers spend their time mulling over which sports team to root for or pop-star to obsess over, others are up to more important things -- like working to save endangered species. Sure, it's a long way from the

DNA testing of cougar crap left along a 1,055-mile trail has established that a young male Puma walked all the way from South Dakota to New England in search of a mate. The poor cat's

It's a TreeHugger tradition, and it's time to declare our independence from these dangerous and polluting anachronisms.

Skylight manufacturer Velux says we need more light and fresh air.

These graceful, nature-inspired wall clocks are a timely delight to look at throughout the day.

This electrically powered prototype will be great for getting you to the market, and carting stuff back home.

Luxury fashion designer Balenciaga has released a Italian leather version of IKEA's iconic utilitarian shopping bag, leading one to assume the world has lost its mind.

A coastal grizzly bear pauses in its fishing efforts to pose for a group of photographers watching nearby.

Have the leaves started to change yet where you are? Autumn is just around the corner, and the annual burst of color is about to begin!

The things nature does to sand and rock are amazing. You may think this is an alien planet with bizarre stone houses for extraterrestrials, but no, this is New Mexico in all its mind-blowing glory.

A female northern elephant seal protects her newborn pup as she warns away a young male with amorous intentions for her.

September's most loved images from our Photo of the Day series.

Photographer Gaston Lacombe's beautiful and heartrending series of photographs of captive animals at zoos across five continents.

Five tons of ivory was crushed earlier this year in Manila at the wildlife bureau compound, in an effort to change it's image as one of the world's hotspots for illegal ivory trading.

45 years ago today, the Apollo 8 astronauts took the photo that some say inspired the environmental movement.

We have shown so many photos of shark fins drying on the roofs of Hong Kong; here's the ground floor.

For consumers, biodegradable and compostable products have mostly been a bust. Still, it is good news that the swiss company Freitag has succeeded making jeans that will break down on commercial compost piles.

War wasn't just a man's game, and it wasn't just about weapons. Soldiers gotta eat.

Madison is a city of lakes.

I was walking through the rainforest and saw something odd.

50 years ago today, the Apollo 8 astronauts took the photo that some say inspired the environmental movement.

Lake Michigan froze over during the polar vortex, so I walked on water.

Could "sharespray" transform our entire future? A light hearted take on the new sharing economy.

As Seattle welcomes yet another tool library, there are bigger picture lessons to be learned about the value of sharing.

Patagonia's Worn Wear events, held in collaboration with sharing start up Yerdle, offer a different, more sustainable vision of Black Friday.

A collective wardrobe spares resources, reduces clutter, and provides a steady stream of fabulous outfits. It's win-win all around.

Getting people out of cars and rebuilding our main streets is not going to be easy, and cannot be oversimplified.

The number of people flying between German cities has dropped 12 percent.

We usually just talk about the plane, but it is a lot bigger than that.

The world is getting hotter. But if we need AC, we have to use it sparingly.

Made from TigerBamboo and hand sculpted flax fiber composite joints, the bikes weigh around 1.75 kg, and, according to the designers, “have a ride quality similar to high end steel, but with better vibration absorption”. And they look funky!

Why hide your bike away when you can put it on display?

In spite of snow and freezing winds, the bicycle season officially opens and we check out the trends and innovations for 2013.

Taking the category and best in show prizes will help Efficient City Farming get the funding to grow!

Did your fear of stains stop you from going to school or work? Probably not. But this company is aiming to bring menstrual cups to African schoolgirls who miss school because they have their period and cannot afford disposables.

Tesla's new boutique shop on Berlin's famous KuDamm beckons, but where is Germany's national strategy for electric cars?

You thought disco was dead? Not with these old payphone booths, now transformed into ultra-exclusive, tiny dance clubs, complete with the disco ball.

All this talk of "bad hombres" got you down? Here's an antidote.

If you dream of testing the limits of solar powered mobility, but don't have the DIY gene, here is someone who can help

Just pick a scooter, drive it, then park it. Someone else takes care of the charging.

It is a strange and wonderful experience where you don't know what's around the corner.

“The dangerous conditions behind the Kingston disaster were not isolated."

High Fashion from roadkill? We also have an art installation that sent Estonians into the trees, egg nog pancakes, the year in gingerbread design, and more.

The green activist group's stunt seeks to draw attention to the devastation wrought by coal.

If you are sick and tired of being optimistic, I have the perfect thing for you, a No Globe snow globe. The tchotchke is a one of a kind--kinda. Only two were made and only one is left to purchase, so act quickly.

A new report details some of the world's major on-going grassroots fights against coal.

A 24-year-old food scientist at the University of Copenhagen has developed a prototype that could potentially save millions of lives.

Perfect for small spaces and aiming at the less-is-more approach, Rubix is a transformer-furniture set that can be both a living room lounge and a dinning room set up. Designed by Colombian firm DosUno Design, the set

Do you know how much of the so-called green or cool architecture is often for expensive hotels, government or office buildings? Well, in this case, it's the complete opposite.

A Model for the World This video by our friends at Streetfilms is not only great because it shows us a powerful example of bike infrastructure improving a city, but also because it shows how you can change the perception of riding a bike among citizens