The 'Spatzenfavela' ('favela' for sparrows) provides a home for birds that have lost their city nests and roosts due to urban renewal.

Dig out those old da Vinci drawings of winged flying machines, as he was really on to something!

This should take the wind out of the "all turbines are evil" crowd's sails.

When a bird charity installs a wind turbine, they're going to do it right.

Brazil's economy is growing fast, and it is expected to need an increase of 50% in power generation capacity over the next decade.

The ENGO charging station uses kinetic tiles and solar panels to charge up to 14 smartphones at a time, and provides free WiFi access and an emergency phone.

Anti-greens often try to make economic arguments against the big spring-cleaning that our civilization is going through.

Using digital fabrication, moss and clay, this designer's "moss voltaics" would use these hardy plants to transform sunlight into electricity.

The floating tidal stream turbine off the coast of Scotland has proven that it can produce power safely and cheaply year round.

Molded out of plant-based bioplastics and sitting on a wooden base, this curvaceous piece combines traditional craftsmanship and new industrial design.

Here's a new take on disposable tableware: these are made from discarded food.

The thin, skin-like electronics may usher in a future of earth-friendly gadgets.

They're not as green as they seem.

No more pleather: The Parisian shoe brand proves that vegan style can be sustainable, not just ethical.

Here's an intriguing alternative to single-use plastics -- sourced from avocado!

The biomix-infused suit helps break down a body, while neutralizing toxins and boosting plant growth.

It was hot last year, too.

It's a surprisingly well-rounded and thorough view of sustainability that shouldn't be limited to boy scouts.

Putting money into non-motorized transportation is just the thin edge of the Agenda 21 wedge.

Wendell Berry is a fount of wisdom and inspiration, so it was great to see that Bill Moyers spoke with the farmer, poet, eco-philosopher about the role of activism and spirit in creating positive change.

For all the kooky and outlandish conspiracies, there is a serious battle going on about how we define our future. Demonizing the cyclist is a part of that war.

The Southern Poverty Law Center says “It is time to call out Agenda 21conspiracy theories and the people spreading them.”

Jacob Scherr of NRDC (a group that helped write the Agenda 21 document) looks at the success that the conspiracy theorists are having.

It's more than just a bike; it is a different way of thinking about design and manufacturing.

It's the election cycle, and Agenda 21 has become an issue.

Why can't we all just get along? New campaign humanizes cyclists.

The new digital billboards taking over our cities bring a whole new set of problems. That's why we need these orgs.

Ecotricity's collapsing cooling towers return. This time, they're tapping into popular anger over utility profits.

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

It's a mix of evaporative cooling and phase change that takes the temperature down 30 degrees celsius. But does it really work?

As scooters and e-bikes proliferate, we need a place to put them.

But don't think that it is the only thing that keeps construction workers safe.

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

An advisory panel says only experienced climbers should be allowed.

Once a rail artery feeding Manhattan's core, the High Line was eventually abandoned only to be reborn as an immaginative and inspiring public space.

Even multi-millionaire pro-basketball players can ride bikes to commute to work!

With this clever new trend, you can take your herb garden for a spin, create a grass mohawk in the spokes, and more.

Check out the live feed of the Future Tense conference, Feeding the World While the Earth Cooks.

Need a bicycle basket that is even handier than the classic wicker thing? The Bent Basket covers a variety of carrying needs.

You know bikes are good. City planners know bikes are good. Yet as soon as cities are successful in getting people biking, a horrible catch-22 is set in motion.

Yes, it's nice to ride unencumbered, wind in your hair, etc. It's also great to bring it all with you - from your honeybees to your honeybunch.

Yes, it's National Bike Month. What's even better - it's National Bike Year, and Maybe National Bike Decade. Here's Three Ways to Up Your Cycling Enjoyment

A student project transforms bicycle wheels into rolling animation -- magic ensues.

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.

Barcelona's bike sharing users are in an uproar; the city council wants to raise the anual fee by 116% in order to reduce the transportation budget.

In Barcelona, buying bulk is part of the city's history -- and visiting one of these historic shops is a unique olfactory experience.

Can you guess which European cities have the highest percentage of walking + bicycling + public transport? Give it a shot.

Copper is recyclable, but requires a lot of energy to do so. For our plumbing system, we opted for PEX, a crosslinked Polyethylene that is easy to install, non-toxic and long-lasting.

Skip the synthetic colors and raid the produce drawer to make vibrantly dyed Easter eggs.

Two structures are joined by a deck; one part on a solid foundation, the other on wheels to become a traveling studio and performance space.