Some substances used for fuel or energy sources, such as coal, are mined.
What is called energy sources?
"Energy sources are forms of potential energy that can be used to perform work."
What are the different types of energy sources?
" Energy sources are categorized as renewable if they constantly and rapidly renew themselves for steady, reliable use. Any other source of energy is considered nonrenewable."
To know more about energy sources here
https://brainly.com/question/10483137
#SPJ2
