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U.S. city historically among the most polluted in the country, but which has made major improvements in recent decades

Let's find possible answers to "U.S. city historically among the most polluted in the country, but which has made major improvements in recent decades" crossword clue. First of all, we will look for a few extra hints for this entry: U.S. city historically among the most polluted in the country, but which has made major improvements in recent decades. Finally, we will solve this crossword puzzle clue and get the correct word. We have 1 possible solution for this clue in our database.