The 10 best U.S. cities for urban forests

Joni Mitchell sang about “paving paradise” in the 1970s, but some U.S. cities like Portland, Ore., are now making parks from parking lots and creating urban forests that cut pollution and save energy. Which are the nation’s 10 best for greenery?

For a top 10 list, released Tuesday, a federally funded survey looked at the 50 most populous U.S. cities to see which have the most parkland per capita as well as which do the most to create green spaces and make them accessible to the public.

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