① The earth is So we mustn't pollute（污染）the We should protect We mustn't leave rubbish We mustn't smoke in public places（在公共场所）We mustn't walk on the I am a student/ Let us protect the enronment I think the earth will become more The earth will be ② Keeping Water Sources Clean(保持水源清洁) Keeping Water Sources Clean Who is willing to drink the polluted water? It can cause us to be ill and even to We can't wait for a moment to protect our water The water we use comes from oceans， lakes， rivers or But many of these water sources are getting seriously Towns and cities are pouring dust into the Many people are throwing all kinds of dirty things into the Factories are pouring waste material into the Therefore， water sources have become so badly polluted that some of the water is unfit to drink or to Now it is high time that we should do something to protect our water environment from being 保持水源清洁 污染的水会使人生病甚至死亡，有谁愿意喝这样的水呢?我们要保护水源，刻不容缓。我们用的水来自海洋、湖泊、河流或小溪，但这些水源有许多正受到严重的污染。城镇乒把大量的尘埃排入水中，许多人正把各种；各样的脏物投进水中，工厂正把废物排入水中。因此，水源已经污染严重，其中一些不适合再饮用。现在到了．采取措施保护水环境使其免受污染的时候了。③ The world we live in is becoming more and more intolerable because of environmental Bird flu and Sars are two typical examples that environmental destruction may threaten our Besides， forest destruction ， water and air pollution result in decrease of planting land and unpleasant Serious as the problem seems， we can come up with some measures to deal with First of all， the authorities should adopt the policy of "sustainable development"， and laws concerning environmental protection should be put into effect and enforced strictly just as our government has been What' s more， every citizen should realize the seriousness of the problem and make concerted efforts to protect our In addition， planting trees helps improve and beautify the 3选1任你挑
Environment protectionAs you know，there's no enough clean water for So many of them lose their lives because of IAlso we have polluted the land， the river and the So we have to face more and more floods and It's time that we must do something useful to protect our We can plant trees and take good care of We can save the water and ask our parents to do We can't throw any litter onto the ground and we should collect them for If we take good care of our earth today，it will be more beautiful tomorrow．
