A lot of things have been prepared for the Three Gorges Project for thirty years

but some questions still need to be studied. The problems from environment is an obvious one. The developed countries in the world have practised the evaluating systems to the effect impacting environment

and put the ecological problems at the first place. To protect the environment

a few countries have stopped constructing the large-scale dams. Many bitter lessons

such as the late troubles of the Three-Gates-Gorge Dam of our country

the disasters producedby the collapsing of both Banqiao and Shijintan Reservoirs

and the pitiful pictures of near 5

000 dams bursted in cur country during thirty years

have created astonishing losses. The sequelae left from the drowning of the reservoirs and the emigrants' live have came into an incovenient social problem difficult to solve. Past lessons

if not forgotten

is the guide for the future. The internal and external lessons ought to be drawed

the scientific research and the evaluate to all the effects listed above on the ecological environment be strengthened in practice in order to take preventive measures when the Three Gorges Project is constructed. Then

it is possible to bring benefit to mankind.