5. Hazaribagh, Bangladesh – Tanneries
Close to 95 percent of the recorded tanneries in Bangladesh are in the area around Hazaribagh, a place in the country’s capital, Dhaka. These are some of the most outdated and banned refining methods in most countries, not to mention these tanneries dump close to 22,000 cubic liters a day of toxic chemicals into the main river. They can cause cancers from the toxin hexavalent chromium. Residents are forced to deal with high rates of respiratory and skin diseases, as well as acid burns, nausea, dizziness and rashes.