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Some portable air cleaners generate chemicals such as ozone, formaldehyde and hydroxyl radicals to kill microbes. ArtistGNDphotography/E+ via Getty Images

Most air cleaning devices have not been tested on people − and little is known about their potential harms, new study finds

Manufacturers often make bold claims about how well these technologies work. Better testing would allow consumers and institutions to pick the most effective ones.
People with a plan feel more empowered and self-reliant during wildfire disasters. They have better mental and physical health outcomes than those who were less prepared. (Shutterstock)

Prepare for the worst: 10 steps to get ready for wildfire smoke

Wildfire smoke is both inevitable and largely unpredictable. We need to change our activities and behaviours to limit exposure to wildfire smoke and protect health.

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