怎样防止大气污染:有没有关于"保护黄河"的英文文章

Only next to Yangtze River in yellow river, is China the second river, fuck to flow all long 5,464 kilometers of, flow through Qing Lake, Szechwan, gansu, Ningxia, Suiyuan, the west of shanxi , mountain west, river south and Shandong nine provinces," several" form, infuse into to east Bohai Sea, the along the road gathered together a main subsidiary current with the numerous river sichuan , the river valley area amounts to more than 750,000 square kilometers.Visit inside a the segment flows through the large loess plateau region, many subsidiary currents clips to take the sediment of large quantity remits, for in the world river with sand measures at most, the river water reports yellow, as a result get.
On the history, the yellow river flows the city to usually become disaster.According to jot down, more than 2,000 in the last years, the yellow river downstream 溃 dike amount to 1,500 many, than change large-scalely the way have 26 times, flood disaster scope north to Tienjin, the south reaches Jiangsu, Anhui, amounting to 250,000 square kilometers widely.The river water clips the sediment gross that take to the downstream measures, average annually over 1,600,000,000 metric tons.Because the downstream a geography is low and even, the course of river declines the even , the current velocity turns down, the sediment of large quantity hence sink to accumulate on the river bed, average every year overs 400,000,000 metric tons of, the rest sediment then flows the river mouth, forming a delta toward river mouth delta that sea stretch, average build annually six amount to more than 20 square kilometers.Yellow river river valley contain fatty and original fertile fields, the products is abundant, the mountain and stream is magnificent, the resident is several to occupy the Chinese total population quarter, the farmland then invites to occupy national 40%.

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