Environment & Ecology · Environmental Pollution
What is the ecological definition of Quantitative Pollutants based on their classification by existence in nature?
- 1Particulate droplets and solid particles released directly into the atmosphere
- 2Substances naturally present in the environment but exceeding safe threshold levels✓
- 3Compounds formed by chemical reactions between atmospheric constituents
- 4Pollutants introduced into the atmosphere solely by human activities
Correct answer
Substances naturally present in the environment but exceeding safe threshold levels
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