Write about the reasons countries should use renewable energy

Renewable energy sources can be used to produce electricity with fewer environmental impacts. ... For comparison, fossil fuels such as oil, coal, and natural gas are not renewable, since their quantity is finite—once we have extracted them they will cease to be available for use as an economically-viable energy source.

Explanation:

:)

i think it's a)sparta

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.