The Lifecycle Building Challenge 3, overseen by the U.S. Environmental Protection Agency (EPA), will accept competition entries through Aug. 30, 2009. Architects, product developers, educators, environmental leaders, and students are invited to submit building or product designs and ideas that divert construction and demolition debris from the waste stream and support cost-effective disassembly, anticipate future reuse, and reduce greenhouse gas emissions.

"This competition recognizes innovators who are pushing the envelope to protect the environment through green building design," said Jeff Scott, waste division director for EPA's Pacific Southwest region, in a statement about the challenge.

Most entrants may submit built and unbuilt projects in one of two categories: Building (an entire building from foundation to roof) and Product (a building product or material). Students, on the other hand, may only submit unbuilt entries. The competition judges will select outstanding projects in each category, and sponsoring partners will recognize two exceptional entries with two Outstanding Achievement Awards.

For more information about the competition, entry guidelines, and details on past winners, visit www.lifecyclebuilding.org.