n.污染；污染物
They devised proposals to deal with air pollution. 他们构想出处理空气污染的方案。
Many young people could not resist the spiritual pollution. 很多年轻人不能抵制精神污染。
The main pollution sources include: slag, sewage water, smoke, and tail gas. 主要污染物有矿渣，污水，烟气、尾气等。
n.防止污染
无污染的
adj.反污染的
