New York City is planning a $3 billion wall to save it from sea level rise

Ramzi Boudina/Reuters New York City faces a conundrum. Its low-lying land is at ever-increasing risk of flooding as climate change contributes to sea level rise, but many of those areas are also home to incredibly expensive real estate. In the short term, if it wishes to retain its position as a global center of business rather than simply relocating its residents, it needs to protect its inhabitants from the aquatic attack brought about by global warming. In 2012, Superstorm Sandy brought a sur...