Riveting Photos Of Retired Subway Cars Being Dropped Into The Ocean

What actually happens to all those old subway cars that are retired from the New York City subway? One might suspect they’re sent off to the salvage yard where they’ll be scrapped for metal and spare parts before they arrive at their final resting place in some landfill outside of town. While some of that assumption is true, the subway cars actually go on to serve a meaningful (and environmentally friendly) life as artificial reefs on the floor of the Atlantic Ocean.

Environmentally friendly? Can we double check that please?