Oil extraction is the process of removing crude oil from the ground. This is typically done through drilling wells into underground reservoirs where oil is trapped in rock formations. Once the oil is accessed, it can flow to the surface due to natural pressure or may require pumping to bring it up. After extraction, the crude oil is transported to refineries, where it is processed into various products like gasoline, diesel, and other petrochemicals. The extraction process can have environmental impacts, including habitat disruption and potential oil spills, which are important considerations in the industry.