Option (d) EPA measures air quality daily is correct: -
• 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: -
brainly.com/question/20299710
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<u>foodchain = </u>plant - insect - mouse - owl
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<u>biotic factors</u> - rabbit deer plant
<u>abiotic factors</u> - rain, wind, temperature
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Are you talking about the pedal of a flower?
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It is well known that the three main sources of demographic and social statistics are censuses, surveys and administrative records. These three data sources are the principal means of collecting basic demographic and social statistics as part of an integrated programme of statistical data collection and compilation.
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