Which is a true statement about air quality? Good air quality is shown by high levels of smog. O Bacteria is a major cause of poor alr quality. O Water treatment plants measure the air quality. The EPA measures air pollution levels daily.

• Option (a) incorrect because smog occurs in air with high air pollution. It usually occurs in colder weather condition and is a mixture of smoke and fog (water molecules in air).

• Option (b) is incorrect because majority of air pollution is due to carbon emission and particulate material evolved due to it and not bacteria. Some bacteria even fix air pollution through the process of bioremediation.

• Option (c) is incorrect as water treatment plants are primarily used to treat waste water so that it can be discharged in larger water bodies.

• Option (d) is correct because EPA (Environment Protection Agency) calculates Air Quality Index (AQI) for five major pollutants which are; ozone, particulate matter, carbon monoxide, sulphur dioxide and nitrogen oxide. This is done to safeguard public health and take preventive measures.

To learn more about EPA and its relation with air quality indexing, refer: -

https://brainly.com/question/20299710

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Which is a true statement about air quality? Good air quality is shown by high levels of smog. O Bacteria is a major cause of poor alr quality. O Water treatment plants measure the air quality. The EPA measures air pollution levels daily.​

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Which is a true statement about air quality? Good air quality is shown by high levels of smog. O Bacteria is a major cause of poor alr quality. O Water treatment plants measure the air quality. The EPA measures air pollution levels daily.