Why is radiation dangerous?
How does coal affect people’s health?
Why is petrol expensive in some countries and cheap in others?
Does Spain use hydroelectric energy? Where and why isn’t it used more often?
Why are solar panels so expensive?
What kind of biofuels are used to produce energy?
To how many homes does a wind turbine give energy to?
Say some advantages and disadvantages of using of using renewable or non-renewable resources.