Designer/builder Anthony Brenner's hempcrete home takes green building to the next level.

African country reveals plans for world's biggest solar plant.

1366 Technologies raises $20 million to fund a cheaper path to solar power.

4,000 square foot living wall unveiled in Pennsylvania.

Legislation would help move clean energy projects out of the laboratory and into the marketplace.

Renewable energy projects face off against formidable foe.

L.A. artist creates sublime monuments from discarded materials.

Move follows plastic bag prohibitions by several Californian cities.

On Earth Day 's 40th anniversary, John Kerry warns that climate change is the environment's biggest hurdle yet.