ADVANTAGES
2. If electricity is not needed, the sluice gates can be shut, stopping electricity generation. The water can be saved for use another time when electricity demand is high.
3. Dams are designed to last many decades and so can contribute to the generation of electricity for many years / decades.
4. The lake that forms behind the dam can be used for water sports and leisure / pleasure activities. Often large dams become tourist attractions in their own right.
5. The lake's water can be used for irrigation purposes.
6. The build up of water in the lake means that energy can be stored until needed, when the water is released to produce electricity.
7. When in use, electricity produced by dam systems do not produce green house gases. They do not pollute the atmosphere.
DISADVANTAGES
1. Dams are extremely expensive to build and must be built to a very high standard.
2. The high cost of dam construction means that they must operate for many decades to become profitable.
3. The flooding of large areas of land means that the natural environment is destroyed.
4. People living in villages and towns that are in the valley to be flooded, must move out. This means that they lose their farms and businesses. In some countries, people are forcibly removed so that hydro-power schemes can go ahead.
5. The building of large dams can cause serious geological damage. For example, the building of the Hoover Dam in the USA triggered a number of earth quakes and has depressed the earth's surface at its location.
6. Although modern planning and design of dams is good, in the past old dams have been known to be breached (the dam gives under the weight of water in the lake). This has led to deaths and flooding.
7. Dams built blocking the progress of a river in one country usually means that the water supply from the same river in the following country is out of their control. This can lead to serious problems between neighbouring countries.
8. Building a large dam alters the natural water table level. For example, the building of the Aswan Dam in Egypt has altered the level of the water table. This is slowly leading to damage of many of its ancient monuments as salts and destructive minerals are deposited in the stone work from 'rising damp' caused by the changing water table level.
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A power shower head mixes moving air with water, to increase the strength of the water coming from the shower head, while using less water. The advantages are lower water bills, using less water and protecting the environment. Some reviews of power shower heads indicate that the claims are untrue, and that the product does not work as is a waste of money.
lists the advantages and disadvantages of the compaund and stereoscopic microscope
Advantages? You can count on it being on schedule. If you use wind power you can never tell when the wind will stop or blow to hard. The tides are on schedule so you can count on them. Disadvantages: Twice a day the tide stops and changes direction.
There are several advantages and disadvantages of using 1 KG inorganic refrigerants. Some of the advantages and disadvantages are cost, energy efficiency, safety issues, and system issues.
There are many advantages and disadvantages to expert power. One being, the power gets to their head. While it can be good by they know what they are talking about.
Advantages: X-ray and Power. Disadvantages: Genetic mutations and Cancer.
The advantages counterbalance the disadvantages so there aren't disadvantages.
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Advantages -Decisions made quickly -Cheap to run Disadvantages -nepotistic -can be paternalistic
Some advantages of power plants are clean source of energy and efficient. Disadvantages of power plants are dangerous and is difficult to dispose of waste.
The advantages counterbalance the disadvantages so there aren't disadvantages.
It has all the advantages from cost efficient to speed efficiency. Disadvantages? Power dependent.
advantages are that they stop the waves having as much power disadvantages are that they are ugly and take time to build
everything
look at the advantages
water