2
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Which is more harmful, high CO2 indoor or PM2.5 outdoor
Given the levels you're describing, I'd stay inside, but it's a close call.
Pulling up a random Carbon Dioxide Safety Data Sheet, the long-term exposure limit for carbon dioxide is 5000 parts per ...
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2
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What are the pros and cons of various negative ion generators for health benefits?
Some negative ion generators also produce small amounts of ozone, which is a gas that can be lethal if inhaled in concentration. I suppose if you were to find a way to accumulate enough ozone and then ...
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