Fossil fuel

Fossil fuels are fuels formed by natural processes such as anaerobic decomposition of buried dead organisms. The age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years. Fossil fuels contain high percentages of carbon and include coal, petroleum and natural gas. Other more commonly used derivatives of fossil fuels include kerosene and propane. They range from volatile materials with low carbon:hydrogen ratios like methane, to liquid petroleum to nonvolatile materials composed of almost pure carbon, like anthracite coal. Methane can be found in hydrocarbon fields, alone, associated with oil, or in the form of methane clathrates. The theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the Earth's crust over millions of years (see biogenic theory) was first introduced by Georg Agricola in 1556 and later by Mikhail Lomonosov in the 18th century.

The Energy Information Administration estimates that in 2007 the primary sources of energy consisted of petroleum 36.0%, coal 27.4%, natural gas 23.0%, amounting to an 86.4% share for fossil fuels in primary energy consumption in the world. Non-fossil sources in 2006 included hydroelectric 6.3%, nuclear 8.5%, and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%. World energy consumption was growing about 2.3% per year.

Metalhead

Metalhead, Metal-Head, or Metal Head may refer to:

Metal-Head

Metal-Head is a fictional character from the G.I. Joe: A Real American Hero toyline, comic books and cartoon series. He is a member of the Iron Grenadiers, and first appeared in the 1990 edition of the toyline. He is not to be mistaken for another character with a similar name Metalhead from G.I. Joe Extreme.

Toys

Metal-Head was first released as an action figure in 1990. A new version of Metal-Head was released in 1994 as part of the Battle Corps line and again in 2005 as part of a Convention Exclusive.

Comics

Marvel Comics

In the Marvel Comics G.I. Joe series, he first appeared in #114. Metal-Head joined Destro's Iron Grenadier army as his anti-tank specialist. When he began working for Cobra, he was there as a double-agent, spying on Cobra Commander for Destro. The Joes first encountered Metal-Head during the Battle of Benzheen when he personally went up against a group of G.I. Joe armored vehicles on foot, armed with his advanced missile system. Before the battle could be won, it was announced that Benzheen's Emir made a deal with Cobra, putting an end to hostilities. Metal-Head soon reported back to Destro in Scotland, warning that Cobra was planning to attack Castle Destro. Cobra Commander proved him right by launching an attack that led to the destruction of the castle. Metal-Head was not seen working for Destro or Cobra for years after the battle.

Metal Head

Metal Head is a 3D first-person shooter mecha simulation video game developed and published by Sega, and released in 1995 for the Genesis/Mega Drive's 32X add-on, allowing for fully texture-mapped polygons.

Story

Five years after the 'World Federation' was established strife and war are still on the rise. In order to keep the peace the Federation Armed Forces, part of the Federation Police, build fully armed, bipedal Mechs also known as 'Metal Heads'. The Metal Head's success causes a heavy militarization of the countries of the Federation.

A sudden and chaotic revolution led by terrorists, armed with their own fully armed Mechs, breaks out and the terrorists take control of a whole country. The player character (in a Metal Head) is sent in with his team to liberate the country's capital.

The player character starts in a small border town and works his way in to reach the capital.

Gameplay

The game's North American box states "1 or 2 Players", but Sega has confirmed that this was a typographical error and that Metal Head is single player only.