-Oil: Also known as crude oil, petroleum term covers several types of hydrocarbons, which are mainly composed of hydrogen and carbon, but can contain other elements. Petroleum forms mainly of marine vegetation and bacteria that live in the ocean of salt water or other environments millions of years. crude oil deposits are often found in the same places as natural gas, each of which can be removed for energy production. Kerosene is used in plastics production and medicine, among many other products.
-Coal: Coal forms of plants such as ferns, mosses and trees, who lived near the beaches and marshes and swamps millions of years ago. When these plants die, are gradually sediment and time pressed deep into the earth, where they were forced to install heat and pressure. In these circumstances, the enrichment of organic matter in carbon and hydrogen and more oxygen. Carbon is in various stages of development according to its carbon content and increasing carbon-clean coal burns more than the lower. The purest form of graphite, which consists almost entirely of carbon.
-Natural gas: Natural gas is still primarily a plankton, or write your own small aquatic organisms such as algae. It consists mostly of methane, natural gas is often the site of deposits of petroleum products because of its low density, and extracted in the same process. However, with only the natural gas deposits exist. Natural gas is desirable, in part because it burns cleaner than coal and oil. Natural gas is commonly used in residential applications for home heating and there are numerous other applications.
