Yeah, NYC! A greenhouse gas emissions report issued last week says that NYC produces nearly 1 percent of the nation's greenhouse gas emissions. We make up 2.7 percent of the population, meaning that the average New York City resident contributes less than a third of the emissions generated by a typical American. The major reason? Our city's mass transit system. The report was conducted by Bloomberg's Office of Long-term Planning and Sustainability. Read the report online here.