New technology offers a way to seal an entire house in the space of an hour, producing a degree of airtightness today’s builders can only dream of.

A new passive house responds actively to efficiently meet the energy demands of different seasons and weather.

The 64-story Diagonal Tower planned for Seoul, South Korea, includes several passive energy systems and will use 25 percent less structural steel than similarly sized buildings.

For affordable living in extreme circumstances, these design contest winners show how net-zero can be the answer.

Many homes use sunlight for power and passive solar heating. This net-zero energy home in Italy actually alters the spectrum of ambient light to enhance the well-being of the residents.

Seattle’s Dwell Development says that the latest home in its Phase 4 micro-community, the first on-spec home in the Pacific Northwest to meet the strict Passivhaus standards for energy efficiency.

We tour an eco-friendly Portland, Oregon “living building” home that consumes no net energy, no net water, and sends no waste.

After years of creating squint-inducing white cool roofs to reduce solar gain, researchers are coming up with a a wider array of colors, including deep blue, to reflect unwanted rays.

The planned Aliah Hotel near Sao Paulo will feature green roofs, green walls, open-air atriums and rainwater harvesting systems just in time for Brazil to host both the 2014 World Cup and 2016 Olympics.

If an Ewok and a Hobbit collaborated on a house together, this passive-house design by Robert Oshatz for a Portland residence may be what they come up with.

Two residential towers in Milan are nearing completion that will be covered in CO2-eating, oxygen-producing trees that may help clear the smoggy city’s air and reduce energy costs..

A new college science building in the Netherlands employs sustainable techniques, such as a green roof, natural daylight and thermal massing, to help foster a sense of community.

An expansion of St. Petersburg’s Pulkovo Airport will not only provide vast interior vistas from all levels, but also save energy costs via natural lighting and passive solar features.