Dear mayor,
Im writing to you to express my view on the water pollution problem.It is generally accepted that water pollution is a serious public hazard today.Most of Rivers around the world are polluted by garbage and dangerous chemicals.Ships contribute to the problem because they rely on rivers for disposing of wastes.Oil and other chemicals can kill fish and make water unsafe for drinking.Taking all these factors into consideration,polluted water is a big problem to everyone,some policy are urgent to be given to solve the pollution issue,I sincerely hope you could consider what I worry about.Yours,Liming