Controversy over quick or slow building of "Three Gorges Project" in Yangtze River have lasted over 30 years. The reasons of a few people who vigorously hold building the project are these to emphasize benefits right before eyes and of a few aspects

such as generating electricity

retaining flood and openning navigation

but that neglects the submergence loss

emigrant in a large amount

sedimentation

bringing out earthquake

geology calamity

ecological disaster and cultural relics destroy

etc.. However

most of scientists advocating to put off the "Three Gorges Project" analysed the environment of the Three Gorges Area and all of the Yangtze River Valley

drawn the lessons at all time and in all countries

and considered the special condition and ability in economy of our country. Meanwhile

they take the international struggling situation into full account after having quoted a vast amount of investigation data.