They're hot, they're celebrities, and they believe in saving the Earth. But what's better is that they all have one thing in common (besides the environment) -- they're single! We've listed some of our favorite eco-hotties below

From sexy Leo's mega donation to tigers to Kevin Costner's surprise knowledge of oil clean-up technology, celebrities were on fire this year. There were a few mistakes, however....such as NBC's "Tonight Show" debacle, which sent a barely used set to landf

This is DiCaprio going back to his first love, in a way, as before becoming an actor, he thought about becoming a marine biologist.

100,000 acres of Sumatran rainforest to be protected in Indonesia by a new type of zoning, which will generate sustainable revenue from non-timber forest products.

Watch a remarkable clip of Heidi the octopus as she sleeps and dreams – from the new PBS series, Octopus: Making Contact.

A couple of years ago, I made the New Year's resolution that my new clothing purchases would be limited to green garments. With the quality and selection of ">green fashion that's become available recently, it's been a promise

This cozy cabin in the woods was an exercise in resourcefulness and even bartering of skills for a community of natural builders in Oregon.

I wrote my first TreeHugger post more than seven years ago. Since then, there's been a lot of water under the bridge. Here are some of the many highlights.

The smart arrangement of spaces and natural daylighting help make this cottage's relatively small footprint feel quite big.

Bye bye, lake. Where it's going, nobody knows for sure.

This is not easy to do.

This couple have found a balance between financial security and freedom, by renting out their house, living out of their renovated garage, and traveling in their van conversion.

Etsy invited TreeHugger to write about their favorite green baby items in the Handmade Kids series; clothes and accessories made for children by independent designers. Etsy is that wonderful website that features all things handmade to buy and sell by

Etsy is holding a contest to pick web readers' favourite choices of handmade children's items in seven different categories: furniture, toys, eco-friendly, art, home decor, clothes and accessories. All are made for children by independent designers.

Etsy, the website that features all things handmade to buy and sell by artists and artisans, held a contest to pick web readers' favourite choices of handmade children's items in seven different categories. These were: toys, eco-friendly, furniture,

A photography fanatic creates beautiful iPhone docks as a homage to old cameras.

The shopping world is rife with corruption and exploitation, and while it would be lovely for companies to mend their evil ways, that's highly unlikely. In the meantime, Etsy provides a decent alternative for conscientious shoppers.

Feathers, shells, leaves, flowers and even bark are encased in resin to create this lovely collection of handmade, resin-based jewelry.

The USGBC is really on to something with their new initiative.

Demand for this 'green gold' is so high that people are waiting months to get a sapling for backyard planting.

When a New Zealand supermarket chain ditched plastic packaging, produce sales skyrocketed.

Four miles from the shore of Key West, the fatigued iguana eagerly scrambled aboard the kayak and hitched a ride home.

It's sustainable!

And even worse, they are devouring the much-smaller native treefrogs.

One couple's infamous battle over the right to grow vegetables has resulted in a new bill.

So what if it doesn't have pedals and isn't as practical as an e-bike, it's so elegant and minimal.

A controversial new ordinance tries to deal with another consequence of mass tourism.

This affordable tiny house was 3D printed using mud, rice husks and straw to create a "zero-kilometre" structure.

These designer shoes embody traditional craftsmanship and a Slow Fashion aesthetic.

A new study has found that the air pollution from Alberta's massive tar sands operations is putting the health of downwind residents at risk by releasing unsafe levels of carcinogenic and toxic chemicals into the air.

The breakthrough also scored 18-year-old Hayley Todesco a Google Science Fair Award.

According

The Crisis of Civilization explores our modern cultural crises by sampling archive film footage from PSAs. Now the makers are asking budding film makers to have a go themselves.

Bike-powered devices often feel like hippy gimmicks. Yet for some communities, they offer an important glimpse of more resilient technology.

The unique paint could provide clean power to homes at a low cost.

The project will also include molten salt energy storage for 24 hour solar power.

Pioneering solar house was designed and engineered by women

And now, in the 'Give me a break' category, the folks behind this garbage can scanner assume you can't make a grocery list on your own.

Because of course you're thinking about water conservation in your yard in the middle of winter.

A smart fridge might well make you fatter and poorer.

The sustainable fashion design competition is encouraging Asia’s emerging fashion designers to create mass-market clothing with minimal textile waste.

It is estimated that around 100 elephants are being killed each day by poachers to meet the growing demand for ivory in Asia.

The dead ones washing up on beaches are "just the tip of the iceberg."

We live in turbulent times, but this beautiful animation offers a systemic approach to facing up to change.

A quantity surveyor deals with construction costs for a living, and shows how it's done.

In which snail mail provides a lesson in the loveliness of slow living.

The plight of the bumblebee is a matter of great concern. Their numbers are declining, some species are on the brink of extinction and colony collapse disorder has spread in the U.S. Albert Einstein may (or may not) have said

If you like a little sugar in your morning (and late morning, and afternoon) coffee, but don't like the calories, there's a good chance you use one of the many artificial sweeteners on the market. But there's plenty of evidence

What happens when you find bees have made your home into their hive? You call Mike 'The Bee Guy' and document it their removal.

Yesterday Brian wrote Galapagos Islands Moved Off Endangered Sites List, concluding: