True stories

The soon-to-be-constructed gardens on the St. Pauli Bunker are only the latest effort in a long list of ambitious green roof projects in Hamburg.

Prinzessinnengärten was a wasteland for over half a century, but residents have transformed it into a new green space where they grow organic vegetables.

Bosco Verticale (Vertical Forest) is a pair of residential towers in Milan which are covered in plants that act as natural air conditioning and are home to many species.