US exporting dirty fuel to already pollution-choked India

New Delhi: US oil refineries that are unable to sell a dirty fuel waste product at home are exporting vast quantities of it to India instead. Petroleum coke, the bottom-of-the-barrel leftover from refining Canadian tar sands crude and other heavy oils, is cheaper and burns hotter than coal. But it also contains more planet-warming carbon and far more heart- and lung-damaging sulfur - a key reason few American companies use it.
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