Hazardous smoke rises from a building using heavy oils. (Courtesy Environmental Defense Fund/Isabelle SIlverman)

What’s your building burning? Some 10,000 buildings in New York City are stuck on the dirty stuff—heavy heating oils—to keep warm, which is polluting the air across the city. But as of the first of this month, the city has begun to phase out these feuls in favor of more environmentally-friendly and health-conscious alternatives. As part of plaNYC’s initiative to remake New York City with the cleanest air of any major U.S. city, NYC Clean Heat aims to achieve a 50 percent reduction in fine particulate matter (PM2.5) by the end of 2013.

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