Provided free by New York City, the iconic, maroon Redbird subway cars, once a favorite of graffiti writers, are being used to transform "a barren stretch of ocean floor into a bountiful oasis, carpeted in sea grasses, walled thick with blue mussels and sponges, and teeming with black sea bass and tautog."
While there may be short term benefit in Red Bird Reef and other similar projects, there are concerns about the long term effect of dumping any material into the ocean.
However, five subway cars sunk off Sea Girt in 1990 show no elevated signs of toxicity and only light corrosion. William C. Muir, an oceanographer with the Department of Environmental Protection said: ''The Sea Girt reef cars were covered with coral ... at the asbestos levels we are dealing with, we see absolutely no indication of a public or aquatic threat."
Sections of the World Trade Center may also be used to attract fish and remediate ocean ecosystems.
Photo by anarchosyn used via Creative Commons.