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Particulate matter is made of a mixture of solids and liquids droplets. They can be directly released into the environment or they can be formed by chemical reactions in the atmosphere. Inhalable particulate matter, such as PM2.5 and PM10, can enter the lungs and cause serious health issues.
PM 2.5
PM 2.5
Particles smaller than 2.5 micrometers
Emitted mostly from combustion of gasoline, oil, diesel, and wood
PM 10
PM 10
Particles smaller than 10 micrometers
Dust from construction sites, landfills and agriculture
Also emitted from wildfires, waste burning
Includes pollen and fragments of bacteria
source: dreamstime.com
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