The world's energy demands are changing. Clean energy sources provide an alternative to traditional fossil fuels.
The graph shows the change in total world energy supply and the supply of energy from fossil fuels between 2000 and 2020, alongside predictions up to 2050.
The total energy supply is the sum of the fossil-fuel energy supply and the clean energy supply.
Describe the change in the supply of fossil-fuel energy and the supply of clean energy between 2000 and 2020.
Calculate the predicted rate of increase in the total supply of energy in EJ per year between 2020 and 2050. Show your working.
