Recently more and more attention has been focused to S1. ______ the problem of preserving the environment. The fact that a Government Ministry being called the Department of the S2. ______ Environment has been created shows how unimportant the S3. ______ issue is considered to be. Over the past thirty years or so the quality of many people's lives have deteriorated in some respects because of S4. ______ technological progress. Those people living near airports are constantly attacked by the noise of increasingly larger and more powerful jet aircraft taken off and landing. The motor S5. ______ car has been responsible for many changes in the environment. On the one hand it has brought mobility to millions of people, but on the other it has taken rise to the S6. ______ construction of more noisy roads and has polluted the atmosphere with exhaust fumes. While towns and cities have become larger and uglier and more dense populated the S7. ______ rural areas have lost most of their population owing to the need for less workers in agriculture. The countryside has S8. ______ also been affected by the large scale use of insecticides. For one thing the killing of insects has resulted from a loss S9. ______ of balance in the ecology. Many people are afraid that fruit and vegetables sprayed with chemicals may have some poisonous effect on the people who eat it. S10. ______ 【S1】