Bioremediation

"Phytoremediation" is a growing field (pun intended) of practice that uses particular types of plants to leech toxic materials out of the soil in contaminated sites.
Dec 30, 2010   ASLA's The Dirt blog
With more than 11,000 acres of brownfield sites in New York City sitting underused due to contamination, officials there want to get things cleaned up and reused. Urban designer Kaja Kühl offers this field guide to small-scale bioremediation to help.
Nov 7, 2010   Urban Omnibus