1) What is pollution? a) dirty and dangerous air and water b) clean air and water 2) What is it? a) air pollution b) water pollution c) land pollution 3) What is it? a) air pollution b) water pollution c) land pollution 4) What is it? a) air pollution b) water pollution c) land pollution 5) What is it? a) air pollution b) water pollution c) land pollution 6) What is it? a) air pollution b) water pollution c) land pollution 7) What is it? a) air pollution b) water pollution c) land pollution 8) What is it? a) air pollution b) water pollution c) land pollution 9) What is it? a) air pollution b) water pollution c) land pollution 10) What is it? a) air pollution b) water pollution c) land pollution

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