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The WHO urban air quality database estimated Delhi's mean annual PM 10 levels in 2010 as 286 μg /m 3 and London as 23 μg /m 3. In 2014, the database estimated Delhi's annual mean PM 2.5 particulate matter levels in 2013 as 156 μg /m 3 whereas, London have only 8 μg /m 3 in 2010 but the nitrogen dioxide in London breach the European Union 's ...
Toxic: a chemical that has a median lethal concentration (LC 50) in air of more than 200 parts per million (ppm) but not more than 2,000 parts per million by volume of gas or vapor, or more than 2 milligrams per liter but not more than 20 milligrams per liter of mist, fume or dust, when administered by continuous inhalation for 1 hour (or less if death occurs within 1 hour) to albino rats ...
One of tallest (nearly 24 inches) and heaviest (17.5 pounds) air purifiers tested, the Winix 5500-2 Air Purifier is ideal for small-to-medium rooms (up to 360 square feet), with a True HEPA filter ...
Workplace air that is polluted with fine particulate matter or noxious gases but that contains enough oxygen (in the US, this is ruled to be a concentration above 19.5%; in the Russian Federation, above 18% [citation needed]), can be rendered safe via air-purifying respirators. Cartridges are of different types, and must be chosen correctly and ...
Researchers using high-tech air monitoring equipment rolled through an industrialized stretch of southeast Louisiana in mobile labs and found levels of a carcinogen in concentrations as much as 20 ...
Use an air purifier, or an air conditioner that pulls in inside air and has an up-to-date, effective air filter. If your air purifier is small, run it in a smaller room and say in there as much as ...
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