Today pollution has become a more serious problem to us.The air, the water and the land are polluted by waste or poisonous things.It does harm to human beings, animals and plants.

　　今天污染已经变成一个非常严重的问题。空气、水和土壤都被废弃的或有毒的东西所污染。它对人类、动物和植物都有害。