three days of smog in New York City
... that three days of smog in New York City 50 years ago today increased public awareness of air pollution and led to the passage of the 1967 Air Quality Act?
... that <b id="mwyQ"><a href="./1966_New_York_City_smog" id="mwyg" rel="mw:WikiLink" title="1966 New York City smog">three days of smog in New York City</a></b> 50 years ago today increased public awareness of air pollution <i id="mwyw">(pictured)</i> and led to the passage of the <a class="mw-redirect" href="./Air_Quality_Act" id="mwzA" rel="mw:WikiLink" title="Air Quality Act">1967 Air Quality Act</a>?