Sagot :
Answer:
Over millions of years, heat and pressure from Earth's crust decomposed these organisms into one of the three main kinds of fuel: oil (also called petroleum), natural gas, or coal. These fuels are called fossil fuels, since they are formed from the remains of dead animals and plants.
Answer:
From an energy perspective, primary fuels such as coal, oil, natural gas, and uranium are natural resources. Moreover, flows in nature like wind, and hydro are also natural resources. Unlike flows, primary fuels are in deposits within the Earth that must be discovered and extracted.