Oil comes from ancient (millions of years) algae which dropped to the bottom of lakes and rivers before they could be consumed and were laid down in layers of the rocks over time the pressure and other conditions converted them into oil the oil would then pass through some rocks heading towards the surface before being blocked by impermeable rocks and pool underneath those rocks. These conditions are found in Americas, the North Sea, Nigeria and many other locations like the Middle East, many of these locations were exploited earlier than the Middle East since the Middle East compared to many other regions didn’t use much oil they became key exporters of oil.
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