3 Dam gorges

KEY QUESTION: Using an example you have studied explain how energy sources can be an advantage and disadvantage for humans and the environment.

|3 GORGES DAM ADVANTAGE |3 GORGES DAM DISADVANTAGE |
|| |
|Environmental |Environmental |
|It generates huge clean energy power that is equivalent to various nuclear energy |Flooded an area of 632km squared|
|plants. 20% of China’s energy comes from the dam. | |
| |The building of the dam needed energy so many pollution was caused. |
|Green house emissionshave reduced rapidly as there is a new and more efficient | |
|way of making energy |There will also be clear water erosion down stream due to the hold up of sediment |
||behind the dam. |
|The three gorges dam also provides flood control preventing any future floods | |
|being carried out as the engineers can control the flow of water |Habitats and trees lost because of back flooding.|
| | |
|Social |Social |
|It has generated employmentby hiring a lot of engineers and people to control the|24500 farmlands flooded and people(844200) in them re-located. |
|dam | |
||Money would have to be spent on their relocation |
|It has gained a lot of money income by having more alternatives of energy, this | |
|saves money as there are other ways to gain electricity, it is also a way to keep |The cost of the construction was about 24 billion dollars|
|money in the country as they don’t have to spend on imported energy, instead they | |
|pay the Chinese dam for energy |Sediment may clog the turbines being used in the dam and that the efficiency of the |
||dam will drop or even turbines will stop working proving to be expensive for its |
|The Yangtze river is now navigational as the dam has a system of ship locks |repairs |
|installed enabling the ships to navigate easier, this caused a drop on the charges|...