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Which is the correct definition of renewable energy?
A resource that does not run out
A resource that is being (or can be) replenished as it is used
A resource that does not create pollution
Why is biofuel described as carbon neutral?
The plant absorbs lots of carbon dioxide in the process of respiration
The plant absorbs the same amount of carbon dioxide for respiration, whilst growing, that is given out when the plant is burned
Plants absorb the same amount of carbon dioxide for photosynthesis, whilst growing, that is given out when they are burned
What is a common disadvantage of renewable energy resources?
Not reliable
Not repeatable
Produces pollution
