While U.S. power plants have considered petroleum coke or “petcoke” to be too dirty to burn, India, on the other hand, has been importing this coal by-product of tar sands refining for years. However, it may be seeing its last days in the country which has served as its biggest importer.

In the aftermath of an Associated Press investigation published on December 1, India's Petroleum and Natural Gas Minister Dharmendra Pradhan has said the country is formulating plans to phase out petcoke imports. The AP investigation, filed from New Delhi, revealed that citizens who live near petcoke refining facilities have come down with a range of air pollution-related illnesses in recent months and years.