One of the city's wealthiest neighborhood is also among its most polluted, according to a new air quality study. Researchers examined data from 150 sensors mounted atop light poles to figure out which communities had the highest levels of air pollution from contaminants like elemental carbon, nitrogen dioxide and sulfur dioxide, which "can irritate lungs, worsen asthma and boost the risk of heart attacks" — and the Upper East Side turned out to be one of the worst, according to the Daily News.

Part of the air pollution comes from heavy car and truck traffic, but another major factor was the concentration of buildings with oil-burning boilers, 1010WINS reports. The Post points out that buildings that burn No. 4 and No. 6 oil for heat were responsible for particularly high levels of airborne pollutants. The findings "shocked" Upper East Side resident Mary Beth Adelson, 38. "I would have thought downtown would have it a lot worse than we do."

The results also surprised her neighbor, Mayor Bloomberg. "There are wealthy neighborhoods where the map is really surprising," said Bloomberg, who is in Copenhagen for a climate change conference. "I think this is going to get people to say, `Wait a minute, I didn't realize it was in my neighborhood.' We always assume some of these problems are the other guy's problems. When you see it's your fault then maybe you behave differently," added Bloomberg, who has promised to reduce harmful gas emissions by 30 percent by 2030 as part of his PlaNYC vision.

Other neighborhoods with high levels of air pollution included Midtown, Washington Heights and Hunts Point in the Bronx, while the city's cleanest air came from Little Neck and Bayside, Queens and the South Shore of Staten Island.