Chlorofluorocarbon - Is the cause of depletion of ozone layer., Global warming - is the cause of melting of glaciers on the Polar ice caps., Air pollution - It causes respiratory diseases in human beings., Making furniture and paper - Is the cause of deforestation, Traffic Jam - Is the cause of noise pollution,

Environment

打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？