What if advertisements on billboards were replaced with old masters--it almost happened in Paris.

To highlight the accelerating disappearance of Arctic sea ice, this man plans to survive alone on a melting iceberg for up to one year.

This app gives free ad space to deserving charities and NGOs on one of our tech-centric culture's most common screens - our smartphone lock screens.

A Florida craft brewery is now offering its six-packs with these biodegradable, compostable and edible packing rings that are made with wheat and barley.

These lockable aluminum panniers might be the answer to my prayers.

'Fly less' is the obvious answer, but there are some effective interim solutions, too.

Is Spaceflight-shaming the next big thing after flight-shaming? Or do we have bigger things to worry about?

Everything fit into my carry-on backpack, and I still ended up with extras.

Fernweh Food Co. packages its plant-based, dehydrated food in glass jars and muslin bags.

This Barcelona garden is about as simple as it comes. Only it's 70 feet high.

Arum is a ring of ashes that creates a place of remembrance on a specific tree. The biodegradable ring is placed around the trunk of a tree and then left to disintegrate naturally while leaving a permanent mark.

yök commissions upcycled stools by ex homess people and Curro Claret

At yök we do not only work hard to save energy, but also water. According to Airbnb, guests in Europe renting a home use 45% less water than when staying in a hotel. But there is more to a bathroom than saving water; materials also play an important role

These simple but intriguing urban art sculptures made out of repurposed tires bring a new sense of place to some of Barcelona's neglected streets.

The city's iconic chamfered blocks will become superblocks the size of small towns.

A compact apartment in a traditional building near Barcelona's waterfront is transformed into an airy, modern home.

In times of comfort snacking, there are plenty of fulfilling options that are actually good for you.

After years of tiny house bloat, it is nice to see a minimalist design that gets back to the essentials.

It's got quality and technology and can go anywhere; this is a concept with legs.

But where do you put it?

Who needs a Disney castle when you could have one of these fairytale tiny homes instead?

I have to admit I'm a bit the green grinch of the family: I really can't stand all the mindless consumption over the holidays, and I'm always pushing the buy nothing concept. I don't even have a Christmas tree.

This Christmas tree by Giles Miller will keep on going, year after year.

Around the country, Christmas trees are recycled for an unlikely purpose: they make for good fish habitat.

Created by Argentine designer José Manuel Rebert Alarcon, the sleek alternative to a dead tree allows other uses during the year.

After reading an article that recommended spending $1,300 on 'must-have' beach gear, it's time a serious talk about what's necessary and what's not.

Scientists and concerned beachcombers are looking for answers.

This dismal finding shows that our eating culture needs a serious overhaul.

It's a problem when nobody wants to touch anything.

One way to keep kids healthy is to give them light, air, and openness.

The age of diesel and petrol cars is ending. It’s time to do the same for fossil fuel heating.

Check out an insulated stainless steel mug for free, as you would a library book.

This could be the key to getting people to carry reusable mugs each day.

Single-use cups don't need more sorting. They need to be eliminated.

Consumers are choosing brands they think are better for the planet, so it’s important they know what they’re getting.

Three Republicans and former administrators of the Environmental Protection Agency penned an important op-ed in The New York Times arguing for a Republican case for climate action.

The 6.3kW solar array might not produce enough energy to power the White House, but its symbolism is important.

Lets give a high five to these scientists who show that shaking hands is a filthy idea.

President Obama talks about the need for climate action in the state where he recently green-lighted off-shore drilling.

The TreeHugger view is that hey, we like trees, and parks are precious, especially when they are designed by the likes of Frederick Law Olmsted.

His analysis is both informative and humorous – a perfect way to spur people to action.

'Merching for a cause' perpetuates many of the problems it claims to help.

The key to sustainable fashion lies in simplifying materials and design.

A new partnership with iFixit offers step-by-step instructions for fixing damaged gear.

We need a new approach to making and buying clothes because the current system is unsustainable.

NACTO lays out a vision for how autonomous vehicles, and technology more broadly, can work in service of safe, sustainable, equitable, vibrant cities.

Apparently, policy is more important than place.

We really have to change the way we use our cities.

Vilnius has an idea that would work in a lot of places.

Obviously, you can't literally grow a century-old forest in just a decade, but by mimicking nature's forest-building process, it's possible to kickstart your own mini-forest.