Which of the following is a primary pollutant? A. Acid rain, which forms when sulfur dioxide or nitrogen oxides react with water B. CO, which comes from fossil fuel–powered engines, such as cars C. NO2, which forms when NO combines with oxygen in the air D. Ozone, which forms when oxygen molecules and atoms combine in the presence of sunlight
Biology · High School · Tue Nov 03 2020
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Answered on
Answer B is correct
CO, which comes from fossil fuel–powered engines, such as cars. carbon mono-oxide is the end product of incomplete combustion of the fossil fuels powerd engine like bike ,car and heavy vehicles.CO, is most dangerous gas for ecosystem and source of primary pollution.