________ is (are) a source of chlorofluorocarbons.A) Human-produced chemicalsB) Air conditioningC) Manufacture of plasticsD) Aerosol spraysE) all of the above
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The post ________ is (are) a source of chlorofluorocarbons. A) Human-produced chemicals B) Air conditioning C) Manufacture of plastics D) Aerosol sprays E) all of the above appeared first on Superb Professors.