ABSTRACT
Petroleum has been vital to the economy of all nations in the world and has been praised as “the lifeline of the modern economy.” As the core fuel of global transportation networks, it provides power for billions of cars, trucks, ships, oil tankers, airplanes, and trains and supports the traffic operation of human society. However, production lags behind demand, resulting in the rapid rise of its price in the recent decade. Petroleum can never be as sufficient and cheap as before for many reasons.
