Despite their appearances (and their smell), the subway cars in New York City are actually regularly replaced by newer versions. What happens to the older, obsolete ones? Well, it might not sound great at first, but don't quit on it right away. When the MTA retires a subway car, it takes a journey to the bottom of the ocean. Yes, that's correct. They dump them in the ocean. It's okay, though; this actually does something awesome for the environment. Retired New York City subway cars. Stephen Mallon Once the cars are stripped of asbestos and anything else that would harm...