Spring is the season when the earth is honored with all kinds of festivities, beginning with International Earth Day held on March 20 this year, and leading up to America's own version of Earth Day, celebrated on April 22. Regardless of when you celebrate, the time is aways right to think about green architecture.

• Solar Houses
• Earth Houses
• Energy-efficient Houses

^{Photo: Eco-friendly village at Loreto Bay, Mexico. © Jackie Craven}