Oil is a liquid that comes from the remains of ancient organisms. It is extracted from the ground as crude oil and refined for use. We rely heavily on oil for transportation, materials, and electricity generation. However, oil use contributes to issues like greenhouse gas emissions, pollution, and conflicts. While estimates vary, experts agree global oil reserves will eventually be depleted if consumption continues to rise unchecked. There is no consensus on when this may occur. Alternatives like biofuels and hydrogen fuel cells could replace oil in the long run, but conservation and responsible consumption are needed now to reduce reliance and environmental impacts. Everyone must do their part to address this important issue and work towards more sustainable energy solutions.