第一段there are still many problems of environmental protection in recent years.(環境污染的現狀)one of the most serious problems is the serious pollution of air, water and soil.
第二段(具體分析)the polluted air does great harm to people’s health. the polluted water causes diseases and death. what is more, vegetation had been greatly reduced with the rapid growth of modern cities.
第三段(產生環境污染的原因)many factors are contributing to the deteriorating situation: industrial wastes pumped into the air, the lakes and rivers; a increasing number of automobiles crowding into the streets; the widespread use of plastic bags etc.
第三段(治理這種污染的方法) to protect the environment, governments of many countries have done a lot. legislative steps have been introduced to control air pollution, to protect the forest and sea resources and to stop any environmental pollution. therefore, governments are playing the most important role in the environmental protection today.