These heartbreaking images show what it's like to live and work in one of the most polluted cities on earth

Photographer Pascal Mannaerts has travelled all over the world documenting the lives of some of the world's most diverse cultures. His work has featured in National Geographic, Le Monde, The Guardian, and more.

Mannaerts displays his work on his website, and one of his most compelling stories is "Slaves of Hazaribagh," a photo story put together from his time in Hazaribagh in Dhaka, the capital of Bangladesh and one of the most polluted cities in the world.

In 2013, the Green Cross Switzerland and the New York-based Blacksmith Institute published a report entitled "The Top Ten Toxic Threats, Clean Up, Progress and Ongoing Challenges," Hazaribagh placed 6th.

Much of the region's 185,000 person population work in the tanneries and have to navigate vast swathes of toxic waste and polluted waters to get to and from work every day.