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第三篇Renewable Energy Sources   Today petroleum(石油)provides around 40% of the world’s energy needs,m...

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The UK.  China.  Norway.  The US.  
.The UK.  China.  Norway.  The US.  
/, /    the, a    the, /    /, a  
renewable  recyclable  damaging  scarce  
renewable  recyclable  damaging  scarce  
is the first hydroelectric dam in the world  is of the same size as the US’s Hoover Dam  can generate around 3% of world electricity’  is the largest hydroelectric dam in the world  
The UK.  China.  Norway.  The US.  
biological power sources would be put into use soon.  oil, gas and coal could be repeatedly used in the future.  dependence on non-renewable power sources would be reduced soon.  the Chernobyl disaster would happen in two years.  
there is not enough wind.  wind is not reliable.  they can only be built on the sea.  they might influence the world economy.  
there is not enough wind  wind is not reliable  they can only be built on the sea  they might influence the world economy  
renewable  recyclable  damaging  scarce  
is the first hydroelectric dam in the world.  is of the same size as the US’s Hoover Dam.  can generate around 3% of world electricity.  is the largest hydroelectric dam in the world.  
Petroleum.  Coal.  Natural gas  Water.  
there is not enough wind.  wind is not reliable.  they can only be built on the sea.  they might influence the world economy.  
biological power sources would be put into use soon.  oil,gas and coal could be repeatedly used in the future.  dependence on non—renewable power sources would be reduced soon  the Chernobyl disaster would happen in two years.  
Petroleum  Coal  Natural gas  Water  
is the first hydroelectric dam in the world.  is of the same size as the US’s Hoover Dam.  can generate around 3% of world electricity.  is the largest hydroelectric dam in the world.  
electronics.  biotechnology.  genetic engineering.  nuclear technology.  

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