Answer:It mainly comes form fossil fuels
What are fossil fuels?
They are dead plant and or animals that have been in the ground for millions of years therefore they turn into coal fossil fuels are nonrenewable resources and cause pollution but are cheaper to use compared to solar power thats the reason we use fossil fuels rather than solar after all we can only use solar power in sunny places for example Arizona Texas Florida and Colorado
What are the main fossil fuels?
There are three kinds of fossil fuels which can all be used for energy provision coal, oil and natural gas
Hope this helps
-Tobie the dog <3