What is the healthiest option when choosing a rainwater tank?

— Justine Schenectady, NY

Answered by Lee Hall on August 30, 2010

Is it feasible to reuse greywater as irrigation water?

— Lisa Larson Palm Desert, CA

Answered by Randy Potter on July 8, 2010

What is the "rule" for irrigating a green roof garden?

— baruch weiss Farmersville, OH

Answered by Richard Heller on July 5, 2010

Are compost toilets tested for sanitation and odors?

— vivian moon Mercer, PA

Answered by Rich Franz-√únder on June 17, 2010