6.POWER STATIONS THAT USE RENEWABLE ENERGY SOURCES:
Some power stations use clean,renewable energy sources to produce electricity.These alternatives help to reduce our dependence on non-renewable sources of energy,such as fossil fuels,which also cause environement problems.


6.1.WIND FARMS:

Wind farms use the kinetic energy of the wind to generate electricity.The wind turns the blades of a turbine,at the top of a tower.The blades are cennected to a gearbox which increases the rotational speed of the generator.

 

6.2HYDROELECTRIC POWER STATIONS:

• In conventional hydroelectric stations,the wáter flows from the reservoir to the turbines throungh a high-pressure conduit.Then it flows out,usually into a river.
  
• In pumped-storage hydroelectric stations,the wáter flows from the turbines to a second reservoir.Then it is pumped back up to the higher reservoir and stored for later.These stations are often built in áreas where there isn't enoungh rain or river wáter to keep the upper reservoir full,so the wáter must be reused.