pollutant

n substance that pollutes, eg exhaust fumes from motor vehicles 污染物质（如机动车辆排出的废气）: releasing pollutants into the atmosphere 将污染物质排放到空气里.

political prisoner, political science (also politics), politically, politician, politicize, politicize, politicise, politicking, politics, polity, polka, polka dots, poll, poll-tax, pollard, pollen, pollen count, pollinate, pollination, polling, pollster, pollute, pollution, pollyanna, polo, polo neck, polonaise, poltergeist, poly, poly-, polyandrous, polyandry, polyanthus, polyester, polyethylene, polygamist, polygamous, polygamy, polyglot, polygon, polygonal,