1 When all the eyes focus on the rapid development（快速发展） of the scientific technology（科技）, does anybody pay any attention to the change of our living condition? When the great achievement（成就） of explosion （爆发 激增）of nuclear is being celebrated, does anyone cry for the damage（伤害） to the earth? What sad facts! Just recall（回想） the memory of our childhood. At that time, we all believe that our shy is always blue with white clouds. That water in the lake is clean and clear, and Birds like to sing in the morning everywhere. And a lot of animals are living happily in the big forest. However, look around, rubbishes （垃圾）are flying in the air and floating in the river. Uncomfortable smell fills the city and people have to cover their noses. Irregular changes of the four seasons are the most frightening things I think. The primary school students are still singing that “the spring is warm, summer is hot, and winter is cold”, but we cannot turn a blind eye at the phenomena现象 of the green house effect—global warming（全球变暖） 2 Many people believe that we have developed into a “throw-away society” which is filling with plastic bags and rubbish. What do you think? Wind blows up bags higher and higher in the sky. It is a scary thought that some day the earth will turn into a huge garbage land. Wastes, if not treated properly, will make our life a living nightmare. The environmental issue is getting worse almost every day in cities with very large population. As is often the case, city development outpaces environmental protection. People consume great amount of natural resources and produce wastes. To effectively address such problems, cities need to spend big...
