The Associated Press on MSN8d
Nearly everyone in the world breathes bad air. This is what you can do to lower your riskHANOI, Vietnam (AP) — Everyone loves a breath of fresh air. Unfortunately, too often our air is anything but fresh.
But trying to gauge how bad the air is by looking at these numbers can be confusing. To help people understand air quality levels more easily, many countries have adopted an air quality index or ...
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