Quote:
Originally Posted by stickyfingerz
Pittsburgh 1906
1947
1954
1972
Today

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NIce comparison, but we still get SMOG days here in Toronto. I dont think we need smog days. If you're only going back 100 years though, you are missing the best part air quality days i.e. pre industry, pre greed, pre industrial war. We will eventually find a way to live symbiotically with the earth. The earth has needs and they need to be met too.