Littering, or throwing garbage on the ground, is a form of land pollution. Litter can destroy the habitats of plants and animals. The buildup of dangerous chemicals in the ground is another form of land pollution. The chemicals may come from farms or factories. __4__ They may even harm people who eat the polluted plants and animals.
Many governments, environmental groups, and ordinary people are working to control pollution. Governments have passed laws to keep people from releasing dangerous chemicals into the environment. __5__ Instead they are getting power from the sun, wind, water, and other energy sources that produce less pollution. Many communities use recycling to reduce pollution.
A．Farmers use chemicals to help crops grow. B．This type of pollution may be seen in big cities. C．They also can harm fish and other forms of life. D．These chemicals can spread to plants and animals.
E．In addition, air pollution may be a cause of global warming. F．There are three main forms of pollution: air, water, and land. G．Some companies and people are trying to use fewer fossil fuels. 语篇解读：本文是说明文。文章主要介绍了污染的三种主要形式和控制污染的措施。 1．选F 由第二至四段分别对air pollution, water pollution和land pollution的介绍可知，划线处指：污染主要有三种形式：空气污染、水污染和土地污染。
2．选E 由该空前的“Air pollution may cause such diseases”和“It also leads to polluted rain”以及该空后的“Finally, air pollution damages the ozone layer”可知，划线处讲的也是大气污染的影响，E项内容“此外，空气污染也可能是全球变暖的原因”符合此处语境。
3．选C 本段主要讲述水污染的原因及影响，由该空前的“These chemicals may make the groundwater unfit to drink.”可知，C项内容“这些化学物质还会危害鱼和其他生物”符合语境。
4．选D 由该空前对污染土地的化学物质的描述以及该空后的“They may even harm people who eat the polluted plants and animals.”可知，这些化学物质会蔓延到植物和动物身上，甚至会危害人类。
5．选G 本段主要讲述控制污染的措施，由该空后的“Instead they are getting power from the sun ...”可知，G项内容“一些公司以及有些人正在努力减少矿物燃料的使用”符合此处语境。
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