This document discusses different types of natural resources and fossil fuels. It describes how coal and petroleum are formed from the remains of ancient organisms over millions of years. Coal and petroleum are classified as exhaustible fossil fuels. The document outlines the process of refining petroleum to produce useful products like gasoline and diesel. It also discusses natural gas extraction and its various industrial uses. Finally, it notes that fossil fuels are limited resources and their excessive use contributes to pollution and global warming.