Separate but equal definition warning11/21/2023 It can cause coughing, wheezing, shortness of breath, palpitations, and fatigue it can also aggravate asthma and chronic bronchitis, and has been linked to cardiac arrhythmia and heart attacks. PM2.5 can penetrate deep into the lungs, enter the bloodstream, and move to other organs. In addition, ammonia from fertilized fields and manure can combine with industrial emissions to form PM2.5. It comes from cars, power plants, wood burning, forest fires, and other combustion. PM less than 2.5 micrometers, called PM2.5, can only be seen through an electron microscope. Particulate matter that is between 2.5 and 10 micrometers (smaller than the width of a human hair), called PM10, arises from crushing and grinding activities and dust on roads. Particulate matter (PM) refers to small particles, both solid and liquid, that can enter the lungs and cause respiratory problems. It often forms in warmer months when there is more sunlight, and peaks during rush hour when many cars are on the road.Įach year, ozone causes about 400 premature deaths, more than 800 hospital visits, and 4,000 emergency room visits in New York City. Ground level ozone is produced when emissions from vehicles, power plants, industrial boilers and other fossil fuel burning facilities react with sunlight. It can harm the lining of the lungs, make lungs more vulnerable to infection, and potentially damage them permanently. But ground level ozone, a major component of smog, can cause coughing, chest tightness or pain, decrease lung function and worsen asthma and other chronic lung diseases. When it’s up in the Earth’s stratosphere, ozone gas protects us from harmful ultraviolet rays. cities with populations over 350,000 smaller cities may also do it as a public service. State and local agencies must report the Air Quality Index daily in U.S. Levels over 300 mean very hazardous conditions. If two or more pollutants exceed 100, the highest number becomes the value for the day, and agencies must alert all the groups that are vulnerable to those pollutants. An AQI number under 100 signifies good or acceptable air quality, while a number over 100 is cause for concern and triggers an alert for vulnerable groups. A level of 100 is deemed safe for each pollutant. for four major pollutants regulated by the Clean Air Act-ground level ozone, particulate matter, carbon monoxide and sulfur dioxide. Monitors record pollution at over 1000 locations in the U.S.
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