【正确答案】
[范文]
As is vividly revealed in the drawing above, with the increase of population, thousands of old trees get felled; as the skyscrapers are mounting, rivers and lakes nearby are gradually disappearing.
Ever since man appeared on the earth, man's survival has heavily relied on nature. Almost everything we use in our everyday life comes from nature, ranging from the food we eat, the water we drink, to the wood which is turned into furniture. With the development of technology and population growth, the amount and range of materials used have increased at an alarming rate. However, natural resources are not inexhaustible. Some reserves are already on the brink of exhaustion and there is no hope of replacing them. The widespread water shortage is a case in point. If we continue to turn a blind eye to the worsening environ lent, we are bound to lose the only habitat of human beings and tomorrow is to be our doomsday.
Therefore, the environmental protection must be our priority and should arouse our social concern. In my view, concrete and effective measures should be taken to protect our endangered environment. First of all, laws and regulations must be set up to severely punish those who destroy our environment, In addition, a long-term and nation-wide campaign must be launched to popularize the importance of environmental protection among the general public. Only in this way can we keep a sustainable development of human beings.

【答案解析】[审题]
本文是图画式现象解释型作文。图中描述了随着人口的增加，树木在不断减少；随着高楼的遍布，河流湖泊却正在干涸。可见，图画要传达的信息是：在社会发展过程中，自然资源被过度使用，森林被大面积地砍伐，导致土壤沙化，泥石流频发，河流和湖泊严重污染，甚至干涸；而这种只顾眼前利益的、鼠目寸光的、自私的行为会让我们的地球变成一个冰冷而无生气的行星。必须告诫人们的是：地球不仅是人类唯一的栖息地，为了社会的可持续性发展，人们必须考虑到自己的行为会对未来社会产生什么样的影响。在结尾处，应该重申观点，环境保护一定要成为我们的当务之急，指出人们有责任保护自然资源。