Try Not to Breathe Too Much Air Today, NYC

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Photo: Travelpix Ltd/Getty Images

As you have probably noticed, our streak of pleasant summer weather ended today when a thick cloud of smog rolled into town. The haze isn't just ugly and oppressive — it's also dangerous. With the Air Quality Index at an unofficially "unhealthy" 110, the National Weather Service has issued an alert advising New Yorkers to avoid "strenuous outdoor physical activity" until 10 p.m. (People with conditions such as asthma or heart disease should be extra careful.) On the upside, this gives anyone who doesn't go on a run tonight an opportunity to feel smug about their healthy choice.