Here’s what to know about wildfire smoke and invisible pollutants, and how you can use your phone to decide whether it’s safe to spend time outside.

Read this story here.

<p>Here’s what to know about wildfire smoke and invisible pollutants, and how you can use your phone to decide whether it’s safe to spend time outside.</p>
<p>Read this story <a href="https://www.wired.com/story/how-to-check-air-quality-index-apps/">here</a>.</p>

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