renewable energy sources

Question 1

advanages of wind turbines

Answer 1

no poison gas
no air pollution
no permanent damage to the landscape
no fuel costs
minimal running costs

Question 2

disadvantages of wind turbines

Answer 2

• visual pollution
• you need a lot of turbines just to power one coal power station
• cover a lot of space, ruin scenery
• very noisy
• non reliable
• impossible to increase supply when there’s a demand

Question 3

advantages of solar cells

Answer 3

-no environmental damage
- very reliable in sunny places
-can be cost effective even in cloudy countries
-very low running cost
-the energy is free
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Question 4

disadvantages of solar cells

Answer 4

• only useful in the day
• initial costs are high
• generate energy on a small scale e.g. a house
• often not practical or too expensive to connect to the national grid

Question 5

advantages of hydroelectric power

Answer 5

• uses water-no pollution
• can provide immediate resoponse to an increades demand for electricity
• reliable, unless a drought
• no fuel
• minimal running costs

Question 6

disadvantages of hydroelectric power

Answer 6

-big impact on the environmen-flooding a valley
-causes rotting vegetation and loss of habitat for some spicies
-ugly when they dry up
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Question 7

pumped storage:

Answer 7

gives extra supply just when its needed