Rubbish, however, is only part of the problemof polluting our planet. The need to produceever-increasing quantities of cheap food leads to a different kind of pollution.Industrialized farming methods produce cheap meat products: beef, pork and chicken.

　　4.Rubbish, however, is only part of the problem of polluting our planet.

　　然而，垃圾只是我们这个星球的污染问题的一个方面。

　　语言点:近几年由于人类的行为而导致的严重疾病:

　　Mad cow disease 疯牛病;bird flu 禽流感;A(H1N1)甲型H1N1流感;SARS(Severe AcuteRespiratory Syndrome)非典型肺炎

　　5.The need to produce ever-increasing quantities of cheap food leads to a differentkind of pollution.

　　日益增长的对廉价食物的需求导致了另一种形式的污染。

　　语言点:lead to的意思是“导致”。

　　6.Industrialized farming methods produce cheap meat products: beef, pork andchicken.

　　工业化的农作方式生产出廉价的肉类制品—牛肉、猪肉和鸡肉。