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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
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Which of the following is a primary pollutant? a. acid rain, which forms when sulfur dioxide or nit...
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