Hidden River Cave was once filled with heavy metals and sewage that made the surrounding town smell awful. After a cleanup, it became a tourist draw.

© Jason Gulley for The New York Times

Countries failed to bridge wide gaps on whether the world should limit plastic manufacturing and restrict the use of harmful plastic chemicals.

© Ariana Drehsler for The New York Times

Officials building a Florida detention center appear to be skipping environmental reviews made mandatory decades ago after a fight over an airport at the very same spot.

© National Archives

Officials building a Florida detention center appear to be skipping environmental reviews made mandatory decades ago after a fight over an airport at the very same spot.

© National Archives

New Jersey officials called it the largest environmental settlement ever achieved by a single state.

© Hannah Beier for The New York Times