After Sandy struck in 2012, New York City has been looking for ways to protect itself against the next hurricane flood. One of them is the East River Blueway, a plan to line part of Manhattan with beaches and marshes—and hopefully make the river clean again (doubtful!) Crazy? There are two other plans that are even nuttier.
https://gizmodo.com/three-major-ways-nyc-is-already-preparing-for-the-next-1079481324