Summary

summary 1

In the article “Effects of Dam Building,” the author illustrates the bad effects caused by Dam building.  He first illustrates the type of Dams such as Diversion dams, Hydroelectric dams, and Flood control dams, and then explains the functions of these dams, in order to tell readers how dams work and let readers know what exactly dams are. To support his idea, the author list all damages that caused by dams, such as Starving the River, Changing Temperatures, and Stopping Fish Migration, that dam building causes. Further more, he finally gives his opinion that although dam building will bring ecological disasters in the long term, the temporary financial benefits keep people building new dams.

Summary2

The article “China’s Three Gorges Dam: a environmental catastrophe” written by Mara Hvistendahl casts a doubt on whether the mass construction of  Three gorges Dam, Is good for this country or not. Just as the article said although The Three gorges Dam powered all the down stream of the Yangzi river, the environment disasters that it brings seems eclipse its benefits. To support his idea, the author used the Dam quake, the water displacement and the disease and drought that caused by the built of the Dam to emphasize the damage of the construction. What’s more as far as the author concerned the government oversight should be blamed to the catastrophe.