Nonbiodegradable pollutants, such as certain chlorinated hydrocarbon pesticides (e.g.DDT) and heavy metals, such as lead, copper, and zinc in some industrial effluents, accumulate in the environment.

• 生物不可降解的污染，如氯代烃类杀虫剂（如DDT）和工业废水中的重金属，如铅、铜和锌，在环境中积累。