Oil industry or Oil Patch, includes the global processes of Exploration, Extraction, Refining, Transporting (often by oil tankers and pipelines), and Marketing of Petroleum products. The largest volume products of the industry are fuel oil and gasoline (petrol). Petroleum is vital to many industries and is necessary for the maintenance of industrial civilization in its current configuration, making it a critical concern for many nations. Oil accounts for a large percentage of the world’s energy consumption. The petroleum industry refines crude petroleum and processes natural gas into a multitude of products.