What is hydroelectricity? (hydropower) <ul><li>Hydroelectricity is a way to get energy without burning fossil fuels like gas. Since fossil fuels release carbon dioxide or CO2, hydroelectricity is a way to NOT release carbon dioxide. </li></ul>
How does a Hydroelectric dam work? <ul><li>First a dam is built to slow down the water were a lake exists. Water is allowed to flow bit by bit , through tunnels, so it can turn turbines and drive the genarator , so electricity can be made. </li></ul>
Where in the WORLD are hydro-dams? <ul><li>Hydro-dams can be found in Canada, USA, Brazil, China, Norway, Japan, Sweden, India and France. A famous dam is Hoover dam. One of the biggest dam in the world. </li></ul>
Advantages <ul><li>A few advantages are: </li></ul><ul><ul><li>Hydroelectric dams don't need alot of employees to run a dam. </li></ul></ul><ul><ul><li>Water can be stored up until it is needed. </li></ul></ul><ul><ul><li>Electricity genarated from hydro-dms are is free. </li></ul></ul>
Disadvantages <ul><li>Some disadvantages are: </li></ul><ul><ul><li> If a Hydro-dam breaks it can kill many people with a flood . </li></ul></ul><ul><ul><li>Hydro-dams can stop the homing process of animals like salmon. </li></ul></ul><ul><ul><li>Dams are extremely expensive to build and must be built to a very high standard. </li></ul></ul>
Cost of a Hydroelectric dam <ul><li>A Hydro-dam costs about 30,000,000 US dollars or 240,000,000 HK dollars. </li></ul>
Will hydroelectrity be suitable in Hong Kong? <ul><li>No it won't be suitable in Hong Kong because there are no big lakes to make a dam </li></ul>
Will it be suitable in Italy? <ul><li>Yes. It will be really good in Italy because there are somd big Lakes. </li></ul>
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