参考答案：当今世界，可以有各种各样的污染。工厂将废料排放到空气中，倒人河流湖泊。卡车和火车的噪声是另一种形式的污染。(这些嗓声)让我们整夜无法入睡，甚至在白天也让我们难以安静思考。再者，我们处于丑陋(现象)的包围之中。树木太少，草地稀缺，太多的钢筋水泥。我认为，解决方法就是科学地规划。我们的城市必须要有控制和可持续地发展。最主要的考量应该是人们的生活质量。

解析：
Pollution in today’s world can be in various kinds. Factories pour their wastes into our air and into our rivers and lakes. Noisy trucks and trains pollute in a different way. They may keep us awake at night and even make it hard to think in peace and quiet during the day. Moreover, ugliness surrounds us. There are too few trees, too little grass, and too much concrete. The answer, I think, is scientific planning. There must be controlled and sustainable development within our cities and the primary consideration must be the quality of people’s lives.