Although the term “Passive House” might seem to refer to single family homes, these concepts can be applied to all kinds of buildings.

A couple, their parrot, plus one mother-in-law and her cat have their own private and communal spaces in this renovated apartment in Hong Kong.

Besides the usual hidden storage and mirrors to enlarge the space, this redesigned layout includes a slight rotation to improve circulation.

Located in the heart of Florence, Italy, this small apartment features a minimalist stair, sleeping loft, and a view out onto the city's Renaissance treasures.

How do you make good design accessible to people with small spaces and small budgets?

In this beautiful renovation of a 1927 apartment, the architects created a moving structure that holds the owners large book collection while temporary dividing the living space.

It's controversial and probably cost the party leader his job, but there is much to like in it.

After the beautiful Xylophone of the Forest I shared with you last month, I came across a selection of amazing wooden designs from Spain, both century-old and brand new ones. Confemadera put together an impressive selection

Last week I posted a stunning wooden bicycle, and the beautiful heritage of wooden ceilings in Andalusia from a series of wood design from Spain that Confeadera put together. Other works include the Fab Lab House, some

US Department of Interior Secretary Dirk Kempthorne has reported on a compromise between three Southern US Governors who had been struggling over diminished access to shared surface waters. The language used to report this progress indicates a small

Last weekend, January 22nd - 23rd , over 500 volunteers from Alabama and across the country came together in Mobile Bay to lay the beginnings of oyster reefs. The volunteers strapped on boots

Building "combines affordable housing with wood construction and the promotion of new technologies."

How small is too small?

A lack of space becomes something more roomy with some simple design strategies.

This new loft adds extra space and an extra bedroom in an urban apartment in Brazil.

A clever redo of a small 376-square-foot apartment in São Paulo that uses lots of glass and reflective surfaces.

Some question if it is even possible.

But for everyone else it is a big nothingburger.

Using ceramics and metal nanoparticles, a non-profit organization from University of Virginia is making these simple but effective purifiers that can eliminate up to 99.9% of waterborne pathogens.

This stair does it all: it's a connector, a partition, a bench, a counter and a concealer of clutter.

Last week, we revealed the winner for our Participate! contest, Vinay Gupta's Hexayurt Project. This week, we are profiling two more great entries, the Participate! runners-up. Yesterday, we showed you easy to assemble, 100 percent recycled plastic

With over a third of the world's cranes hard at work building artificial islands, an underwater hotel, and the world's tallest building, biggest mall and most expensive airport, the United Arab Emirates has now turned it attention to building the

Bromberg, then a young lawyer working for an environmental NGO in Tel Aviv, was frustrated that environmental issues were not

In part one of this interview, Gidon discussed FoEME's work in promoting cross-border

Dean Kamen is the kind of inventor we don't imagine exists anymore—a fervent polymath like Thomas Edison. Best known as the creator of the Segway, Kamen is also responsible for major breakthroughs in clean energy, water purification, prosthetics,

With his planes, helicopters, and other fuel-hungry pets, Dean Kamen admits that he takes a lot out of the world. This just means that, in keeping with his immigrant grandfather's advice, he has to put more back in. In the second part of our

Having given Global Water Challenge a Best of Green award earlier this year for their innovative work on the issues of drinking water and sanitation, it goes without saying that TreeHugger is a fan of their work.

A shark's fin is like its fingerprint, with each animal having its own unique patterns and scars.

Plenty of clever spatial overlaps and multifunctional pieces of transformer furniture in this renovation of a 376-square-foot apartment in Melbourne.

An existing 1960s studio apartment in Melbourne has been transformed into a more efficient one-bedroom apartment.

This apartment's built-in 'function wall' maximizes a small space by incorporating sleeping, sitting and storage.

This redesigned space in a 1920s Art Deco building features a new layout that better maximizes space and light.

Though it sounds like a technical term more suited for computer programming, avicaching is actually a growing practice that encourages birders to collect and share their data from bird-watching through an internationally known phone app.

This Thanksgiving, the Sustainable Forestry Initiative (SFI) and National Wild Turkey Federation (NWTF) express gratitude for another productive year working together toward common goals, including ...

At a recent talk Chamath Palihapitiya said he "doesn't use that sh**" and his kids aren't allowed to either.

Asian giant softshell turtles were once thought to be extinct in the Mekong River; this little trooper is one of 150 hatchlings bringing them back.

FANAF separates cats from people in tiny Shanghai apartment.

This small apartment's 'library wall' functions as a way to keep the bed out of view, while also storing books and things.

Two 'active' walls enable this small living space to become flexible and adaptable throughout the day.

This small, efficient renovation of a former maid's room in Paris hides a stealthy little table.

An old, cramped apartment in Tasmania is updated with skylights, plenty of clever space-saving concepts, and a touch of hidden glamor.

Bright pops of yellow, orange and neutral wood cabinetry warm up this small apartment renovation in Moscow.

This 598-square-foot model home is one of the almost two dozen homes that are slated to go up as part of a tiny house community.

An old apartment is refreshed with a new scheme that stacks things up to gain more space.

This small 355-square-foot apartment has been redesigned to be more space-efficient, enough to accommodate a family that loves to entertain and have guests sleep over.

This renovation makes way for an integrated kitchen and study area, a bedroom and a flexible living room.

Tiny-room specialists H2O Architects have come up with a superb design which accommodates four private sleeping areas while still doing this place's views justice.

This problem gets worse as cars get bigger and heavier, no matter what they are powered by.

A new study finds that ultra-fine particles increase the risk of brain cancer.

This clever replacement window expands out to create a private semi-outdoor space for people who don't have a balcony.