Now our living stytle are getting better and better,about fifty years ago ,most of us can not afford to by cars ,computers and houses and so on.but onw ,the usually nessary things are exsits in every house,or in the coming ten years at least.
every coin has too sides ,as our living stytle improved ,there are another problems borning.it is our enviroment.our living condition are getting worse and worse.we should take some steps to improve this.