Sukinda, India
Sukinda contains more than 97 percent of India's chromite ore deposits.
Twelve mines operate without environmental controls, leaching hexavalent chromium into drinking water supplies.
More than 30 million tons of waste rock are spread over the surrounding areas, and untreated water is discharged by the mines into the river.
Sumgayit, Azerbaijan
Sumgayit was a major Soviet industrial center housing more than 40 factories producing industrial and agricultural chemicals, which released 70,000 to 120,000 tons of harmful emissions annually.
Untreated sewage and mercury-contaminated sludge continue to be dumped haphazardly.
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