What Causes Pollution Yes /No/Unsure Clean Air

luanne-stotts
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What Causes Pollution Yes NoUnsure Clean Air Schools Programme Main Pollutants of Concern Nitrogen dioxide toxic gas that impacts on respiratory health (mainly from combustion in air) Particulate matter comes from many sources both

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What Causes Pollution Yes /No/Unsure Clean Air School’s Programme<br>
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Main Pollutants of Concern Nitrogen dioxide – toxic gas that impacts on respiratory health (mainly from combustion in air)
Particulate matter – comes from many sources both natural and manmade. Usually always present when a fuel is combusted but also formed during abrasion of surfaces, braking of vehicles, during construction, demolition and quarrying.
Particulate matter is referred to by the size of the particle.
 Coarse particles have a diameter of >10 microns – usually stopped by the nose
PM10 is particles up to 10 microns – these can enter the lungs and cause respiratory problems
PM2.5 is particles less than 2.5 microns that can get very deep into the longs and interfere with gas exchange<br>
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Main Pollutants of concern cont… Carbon dioxide – released whenever fossil fuels or wood is combusted. Not harmful to health but it is a greenhouse gas that causes global warming. Global warming can have local impacts.
 Methane – mainly released when something that contains carbon is decomposed or consumed. It is a potent greenhouse gas.<br>