Philadelphia ranks third on a list of the least-polluting major cities in the U.S., according to UrbanLand.
Urban areas around the world account for an estimated 71 percent of energy-related greenhouse gas emissions (including everything from power plants to automobile driving). But a new study found that big-city metros differ markedly in how much they pollute.
In a study published earlier this year in the journal Environment & Urbanization, researchers at the World Bank in Washington, D.C., found that New York City had less than half the per-capita greenhouse gas emissions of Denver, Colorado, and Los Angeles--considered by some to be the smog capital of the country--had lower per-capita emissions than Minneapolis, Minnesota. Outside the United States, some of the largest urbanized centers, such as Tokyo, Paris, and even Seoul, had some of the lowest per-capita greenhouse gas emission rates in the world.
Source: UrbanLand
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