According to the latest survey Manhattan is the most polluted part on New York City.

Researchers collected and analyzed air samples from 150 sites across the five boroughs last winter. The survey found that fine-particle and sulfur dioxide pollution was concentrated in areas where more buildings burn oil for heat, and levels were especially high in areas where buildings use so-called residual oil (also known as No. 4 and No. 6 oil) in their boilers.

Read more: New York's Dirty Secret: The effort to clean up America's largest oil spill