Pollution can be defined as an undesirable change in the physica

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Pollution can be defined as an undesirable change in the physical,chemical,or biological characteristics of the air，water,or land that can harmfully affect the health,survival,or activities of humans or other living organisms.	污染可以被定义为有害影响健康，生存，活动的人或其它生物体的空气，水，或土地的物理，化学或生物特性的不应该有的变化。
Because of the abuses and problems of the past, regulations have been enacted that force American industry to be responsible for hazardous waste disposal.	由于过去的这些问题，强制美国工业承担有害物质处理的责任的相关法规已经颁布。