Describe the changes in the percentage of electricity generated in this country between 2012 and 2022 using heavy fuel oil and solar energy. Use data from Figure 1 in your answer.

Heavy fuel oil is a mixture of hydrocarbons that contains carbon, hydrogen, and impurities such as sulfur. When heavy fuel oil is burned, the products of combustion may be released into the atmosphere. Explain the environmental effects of releasing these products of combustion into the atmosphere.

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. Suggest two reasons why.