If you see orange colored smog with an unpleasant oder you know that there is pollution? a so2 b o3 cno2 d h2o

ANSWER:

If there is orange colored smog with an unpleasant smell, there is pollution. Humans, as well as natural sources, contribute to the release of gases in the atmosphere.

EXPLANATION:

Nitrogen Dioxide is a gas that is flammable and colorless in nature. It is a deep red and orange colored gas that can be very harmful to our health. It is toxic in nature and is very reactive with other gases and compounds. Nitrogen oxides can come from volcanoes, lightning strikes, decomposition, and man-made sources such as vehicle exhaust, industrial emissions.

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Answerscripps institution of oceanography; i believe this is correct plz check first good luck;