主题四、环境健康

　　环境污染

　　We are suffering greatly from the environmental destruction. Recent years have witnessed a rapid increase in the number of urban motor vehicles(都市机动车辆). Their emissions contribute significantly to air pollution and are a major ingredient in creation of smog(烟雾) in some large cities. The fundamental way in which the government addresses the problem of environmental pollution is to raise the environmental awareness of the public. Environmental protection is caring about ourselves and ensuring environmental sustainability for future generation.

　　经典句子：

　　Environmental protection is caring about ourselves and ensuring environmental sustainability for future generation.

　　环境保护是关心自身，并为下一代确保环境可持续性发展。

　　锻炼作用

　　Regular physical activity can strengthen the heart and make us fit and healthy. A lack of physical activity can increase our risk of health problems. Exercises can also improve mental health by reducing our stress level. This is especially important for people leading fast-paced lives. Moreover, exercise can still help to boost our self-confidence(增加自信)and give us a greater sense of control(给予更强自控力).