This question is about fuels and energy.
Figure 1 shows the percentage of electricity generated on an island nation between 2012 and 2022 using:

Describe the changes in the percentage of electricity generated on the island between 2012 and 2022 using:
Use data from Figure 1 in your answer.
Heavy Fuel Oil contains carbon and sulfur. Explain the environmental and health effects of releasing the products of combustion of these elements into the atmosphere when the oil is burned.
Suggest one reason why using solar energy is a more sustainable way of generating electricity than burning heavy fuel oil.
Solar energy may not be able to replace the generation of electricity from fossil fuels completely on this island. Suggest two reasons why.