All photos © Martin Roemers

There are now 7 billion people on earth, and according the United Nations Population Fund, one half of us live in cities. Martin Roemers has been photographing the world’s megacities, sprawling urban areas inhabited by millions, capturing their chaos, humanity and dynamism. “Metropolis,” Roemers’ first North American exhibition, opens February 29 at Anastasia Photo, a New York City gallery specializing in documentary photography and photojournalism. The show runs through April 1.

Above: Calcutta.

Cairo Traffic Square.

Mumbai Train Station.

Manila.

Jakarta.