Are there any cost-cutting shortcuts for planting a green roof on my urban townhouse?

— Rachel Diamond, Harrisburg, PA

Answered by Mark Schrieber on August 25, 2009

How much does green construction add to the cost of a new home?

— Larry Chamblin, Pensacola, FL

Answered by Polly Osborne, FAIA, LEED AP on March 22, 2007