Crude oil, which is a fossil fuel, is a natural resource found within the Earth. It is composed of hydrocarbon deposits and other organic materials. Crude oil must be drilled from the Earth and refined and processed to create petroleum products such as gasoline, diesel, kerosene, and asphalt. Drilling, refinement/processing, and the creation of particular products are what the crude oil industry is built around.
Crude oil isn’t being created as it is a nonrenewable resource. Once it is gone, there will be no more. This means crude oil is a limited resource. It is getting increasingly difficult for the industry to find new deposits of crude oil and bring them to the surface.