Fix grammatical errors: It is because mining and refining processes of the petroleum will emit fumes that will pollute the air.
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The oil and gas industry is a major source of air pollution. The oil and gas industry is a major source of air pollution.
The oil and gas industry is a major source of air pollution. The oil and gas industry is a major source of air pollution.
The oil and gas industry is a major source of air pollution. The oil and gas industry is a major source of air pollution.
The oil and gas industry is a major source of air pollution. The oil and gas industry is