81、The waste water will pour into rivers，lakes and fields。It will harm the crops ，kill a large number of fish。废水流到河里，湖里和田野里，污染农作物，杀死大量的鱼。

82、Protecting the environment is every man's responsibility。保护地球环境是每一个人的责任。

83、Cherish the source of nature， totally make a living a life green。珍惜自然之源，共营生命绿色。

84、The law requires a detailed analysis of the potential impact on the environment of a proposed project。法律规定要对拟订项目对环境的潜在影响作详尽的分析。

85、Keep Away From Fire。切勿近火。

86、It's our duty to protect our environment。保护我们生存的环境是我们的责任和义务。

87、Please keep off the grass。不要践踏草坪。

88、They throw rubbish into rivers ， too。他们还乱扔垃圾到河流理去。

89、Trees are very helpful and important for us。树是非常有益的，对我们很重要。

90、The most important question in the world today is pollution。当今世界最重要的话题就是污染问题。

91、Something must be done to stop the pollution。必须采取某种措施来制止污染。

92、It is very important to take care of our environment。这是非常重要，我们要保护我们的环境。

93、We should take many measures to stop pollution。我们应该采取许多措施去停止污染。

94、Do not throw rubbish onto the ground。 Do not waste water. Use both sides of paper when you write. Stop using plastic bags for shopping. Make classrooms less noisy.不要在地上扔垃圾。不要浪费水。当你写字时要在纸的两面都要写。停止使用塑料袋去购物。减少教室里德吵闹声。