The World Happiness Report 2015 takes a look at well-being for the good of social progress and public policy.

A visual breakdown of emissions by country and industry.

Who wins this year's crown of contentment? The results are in for the UN's World Happiness Report 2016.

One woman shows us how easy it is to make useful yarn from her cat's long fur.

Sad Anniversary digg_url = 'http://www.treehugger.com/files/2009/12/one-year-later-tva-toxic-coal-ash-spill-tennessee.php';A year ago, a massive coal ash spill took place in Tennessee. About 5.4 million cubic yards of ash ended up in a river and

After a storm hit Tennessee last Sunday and Nashville saw record-shattering rainfall, the Cumberland River swelled to overflowing and the city experienced an epic flood. As soon as it was safe, residents were out

This modern take on the gabled farmhouse includes lots of clever space-saving ideas.

More bikers take to Twitter to mock bike haters.

The oil spill in the Gulf of Mexico reached an important milestone this Tuesday afternoon when BP started their 'static kill' procedure to seal the oil well, and the good news is, that it seems to be working -- so far. In other green news, the

This week's photo roundup includes a sculpture made from living cherry trees, an artist catapulting LEDs into the sky to make stars, and more.

We've featured a lot of treehouses on TreeHugger, but the plans for this one are a little different: Ten cherry trees will be planted in a circle, and pruned and bent over time to form a unique, two story sculpture.

You can see these magnificent photo portraits of Londoners on a wall or on the web.

Every year, the TED—Technology, Education, Design—conference convenes with the intention of showcasing "ideas worth spreading."

Innovation may be a fundamental part of

The theme of this year's conference is "the next chapter," and each attendee will receive a sample of what could be next in anti-counterfeit technology.

New eavesdropping Barbie records your child’s conversations and transmits them to a corporation that analyzes your kid’s likes and dislikes. And then things get weird.

Made from sugarcane, the new sustainable play pieces will be included in Lego kits in 2018.

It's a great way to spend time outside and travel for cheap.

Scientists find that tumors hold information like a 'black box' pointing to the specific cause of disease.

The eggplant soaks up all of the marinade, which means lots of sweet, smokey, and spicy flavor in every single bite.

These delicious dessert squares skip the crust and the refined sugar. They're quick and easy to make for lightly sweet snacks during fall and winter.

Between planetary and personal health, there's a lot to be said for eating a lot less meat.

Replacing diesel systems with fuel cells could give refrigerated a clean-energy makeover.

This is one of those comparison posts that that could draw many angry comments: like Could Hype Sell An Inferior Hybrid? - Ford Fusion versus Toyota Camry did. Please carefully read the caveats.

I thought the ELF was a great new idea; turns out our hero was there first.

An annual Toronto event is pretty utopian, as two major highways are closed to cars and given over to cyclists.

Of course he has been there, done that.

This gives the "spin cycle" a whole new meaning.

When heavy rains caused rivers to overflow and flood parts of Pakistan last year, it set into motion a surprisingly complex chain of events that scientists are only now beginning to understand -- and which may have

The heat in the upper six miles of the earth's crust contains 50,000 times as much energy as found in all the world's oil and gas reserves combined. Despite this abundance, only 10,700 megawatts of geothermal electricity

Plus... Shell announces first carbon capture project in the Alberta Tar Sands; Arctic oil and natural gas's high cost to limit their global share.

Chocolate, tea and more goodies partner with Fair Trade USA which expands farming programs and experiences record sales.

Take an average cup of coffee or tea to a new tasty level with these quick, easy additions.

These flowery sculptures seem to grow and flourish, out of repurposed dead animal skulls.

The disaster at Fukushima may have faded from the news cycle, but the radioactive waste it left behind isn't going anywhere. At the Saitama sewage treatment plant, 169 miles from Fukushima, workers are dealing with tons of

It's time to put a stake through them and build efficient Passivhaus buildings.

You are not just buying a box but a full service design/build package. Could this take container architecture mainstream?

These delicately formed hand-crank and motor-activated art installations blossom and grow perpetually.

Strawless in Seattle is now officially enshrined into law.

A state of emergency has been declared in Hungary where four people are dead, 120 injured and six missing as torrents of red toxic sludge, the byproduct of bauxite refining for aluminum, burst from a containment pond and poured through six villages in

One designer tackles how the ubiquitous egg carton could be rethought in order to waste less.

And with that comes real fear for the environment.

Leonardo DiCaprio lost the Golden Globe, but he's always a winner on the green activist front. The eco-champ has signed on to be the celebrity face of watchmaker TAG Heuer. Replacing fellow eco-hunk Brad Pitt. But, Leo isn't pocketing a cent of his

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

What’s the best pumpkin for pumpkin pie? Maybe not a pumpkin at all.

From gardening supplies and baby toys to pet products and eco-furniture, check these sustainable online shops before you hit the streets.

'Slow' games make a comeback, as stylish jewelry with a twist.

In a tale of intrigue and derring-do, the crafty cephalopod slipped out of his enclosure and found his way to freedom.

Made out of glass, these rentable cabins in New Zealand's wilderness are meant to reconnect guests with nature.

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