Please read this excellent NY Times article by Ginia Belafante
https://www.nytimes.com/2021/01/29/nyregion/gowanus-canal-development-nyc.html
There are many interesting comments as well posted as well
"The city may approve a plan in Brooklyn that is one of the biggest rezoning projects in memory. But the debate is not playing out in predictable ways."
"Earlier this week, as if an omen sent from the gods of city planning, a barge carrying toxic sediment nearly sank in Gowanus Bay. It was loaded with the “black mayonnaise” dredged up from the Gowanus Canal, sludge that appeared to be in the midst of a dangerous round trip — potentially recontaminating the water that was so slowly being cleaned up after so long. Designated a Superfund site by the federal government in 2010, the canal is a graveyard to industrial sins committed for more than a century."
"The filth has not deterred the real estate industry, which sees in every natural asset the potential for leverage. Where a chemist might see poison, the investor so often conjures a room with a view. For decades now, developers have sketched their fantasies onto the waterway’s immediate surrounding area, 20 or so blocks in the middle of brownstone Brooklyn at the nexus of warehouse chic and rowhouse cozy. The will to overlook the downsides has been fierce. Five years ago, a single empty lot near the canal sold for just under $3 million, or roughly $340 per buildable square foot." (edit)
See link for rest: https://www.nytimes.com/2021/01/29/nyregion/gowanus-canal-development-nyc.html