Nowadays,people are faced with serious problems.One third of the world's people don't have enough clean water.I think water is the most important thing for human beings to live.I suggest we should save water and protect it from pollution.Not only the water,but also the air is polluted.More and more diseases are caused by polluted air.Itis really a big problem.I hope fatories would pay more attention to the air condition in future.And it is also everyone's responsibility to care for our environment.当今人们面临着严重的问题.世界上有三分之一的人没有干净的水.我认为水是人类赖以生存的最重要的条件.我建议大家节约用水,并防止水污染,不仅是水,空气也被污染了.由空气污染引起的疾病也越来越多.这的确是个大问题.我希望以后工厂要注意空气质量.关心环境问题,也是我们每个人的责任.