1) what is pollution ? a) Pollution is the introduction of harmful materials into the environment. b) Pollution is the materials into the environment. 2) Pollution is divided into : a) wind pollution , air pollution b) Water pollution , sound pollution c) Water pollution , air pollution 3) Water pollution a) Adding harmful materials to the land b) Adding harmful materials to the water c) Adding harmful materials to the environment 4) Air pollution example a) Carbon dioxide and sulferdioxide and nitroxide from cars and factories b) untreated sewage c) killing animals 5) un treated seawage causes _______ pollution . a) water b) air c) land 6) Footprint is a) the ozone layer b) impact caused by every person in the planet c) emissions caused by animals

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