Natural gas is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane (97%) in addition to various smaller amounts of other higher alkanes. Low levels of trace gases like carbon dioxide, nitrogen, hydrogen sulfide, and helium are also usually present. Methane is colorless and odorless, and the second largest greenhouse gas contributor to global climate change after carbon dioxide. Because natural gas is odorless, odorizers such as mercaptan are commonly added to it for safety so that leaks can be readily detected.
The Hubbert peak theory says that for any given geographical area, from an individual oil-producing region to the planet as a whole, the rate of petroleum production tends to follow a bell-shaped curve. It is one of the primary theories on peak oil.
Peak oil is the point in time when the maximum rate of global oil production is reached, after which production will begin an irreversible decline. It is related to the distinct concept of oil depletion; while global petroleum reserves are finite, the limiting factor is not whether the oil exists but whether it can be extracted economically at a given price. A secular decline in oil extraction could be caused both by reductions in demand that reduce the price relative to the cost of extraction, as might be induced to reduce carbon emissions or from demand destruction triggered by persistently high oil prices. Switching transport to electric vehicles or biofuels may reduce demand.
Colin J. Campbell was a British petroleum geologist who predicted that oil production would peak by 2007. He claimed the consequences of this are uncertain but drastic, due to the world's dependency on fossil fuels for the vast majority of its energy. His theories have received wide attention but are disputed and have not significantly changed governmental energy policies at this time. To deal with declining global oil production, he proposed the Rimini protocol.
Richard William Heinberg is an American journalist and educator who has written extensively on energy, economic, and ecological issues, including oil depletion. He is the author of 14 books, and presently serves as the senior fellow at the Post Carbon Institute.
The End of Suburbia: Oil Depletion and the Collapse of The American Dream is a 2004 documentary film concerning peak oil and its implications for the suburban lifestyle, written and directed by Toronto-based filmmaker Gregory Greene.
The Party’s Over: Oil, War and the Fate of Industrial Societies, by Richard Heinberg, is an introduction to the concept of peak oil and petroleum depletion.
Julian Darley is a filmmaker, writer and speaker on policy responses to global environmental degradation. He is the author of the book High Noon for Natural Gas, and the founder of Global Public Media, Post Carbon Institute and Mysterious Movies Ltd. He lives in London, England.
The Special Report on Emissions Scenarios (SRES) is a report by the Intergovernmental Panel on Climate Change (IPCC) that was published in 2000. The greenhouse gas emissions scenarios described in the Report have been used to make projections of possible future climate change. The SRES scenarios, as they are often called, were used in the IPCC Third Assessment Report (TAR), published in 2001, and in the IPCC Fourth Assessment Report (AR4), published in 2007. The SRES scenarios were designed to improve upon some aspects of the IS92 scenarios, which had been used in the earlier IPCC Second Assessment Report of 1995. The SRES scenarios are "baseline" scenarios, which means that they do not take into account any current or future measures to limit greenhouse gas (GHG) emissions.
Oil depletion is the decline in oil production of a well, oil field, or geographic area. The Hubbert peak theory makes predictions of production rates based on prior discovery rates and anticipated production rates. Hubbert curves predict that the production curves of non-renewing resources approximate a bell curve. Thus, according to this theory, when the peak of production is passed, production rates enter an irreversible decline.
David Fleming was an economist, cultural historian and writer on environmental issues, based in London.
Energy descent is a process whereby a society either voluntarily or involuntarily reduces its total energy consumption.
World energy resources are the estimated maximum capacity for energy production given all available resources on Earth. They can be divided by type into fossil fuel, nuclear fuel and renewable resources.
The Oil Depletion Analysis Centre (ODAC) is an independent, UK-registered educational charity. The centre is working to raise international public awareness and promote better understanding of the world's oil depletion and peak oil problem. It is based in London and belongs to the New Economics Foundation.
Peak coal is the peak consumption or production of coal by a human community. The peak of coal's share in the global energy mix was in 2008, when coal accounted for 30% of global energy production. Coal consumption is declining in the United States and Europe, as well as developed economies in Asia. However, consumption is still increasing in India and Southeast Asia, which compensates for the falls in other regions. Global coal consumption reached an all time high in 2023 at 8.5 billion tons. Peak coal can be driven by peak demand or peak supply. Historically, it was widely believed that the supply-side would eventually drive peak coal due to the depletion of coal reserves. However, since the increasing global efforts to limit climate change, peak coal in many countries has been driven by demand. This is due in large part to the rapid expansion of natural gas and renewable energy. Many countries have pledged to phase-out coal, despite estimates that project coal reserves to have the capacity to last for centuries at current consumption levels.
Shale gas is an unconventional natural gas that is found trapped within shale formations. Since the 1990s a combination of horizontal drilling and hydraulic fracturing has made large volumes of shale gas more economical to produce, and some analysts expect that shale gas will greatly expand worldwide energy supply.
The Monterey Formation is an extensive Miocene oil-rich geological sedimentary formation in California, with outcrops of the formation in parts of the California Coast Ranges, Peninsular Ranges, and on some of California's off-shore islands. The type locality is near the city of Monterey, California. The Monterey Formation is the major source-rock for 37 to 38 billion barrels of oil in conventional traps such as sandstones. This is most of California's known oil resources. The Monterey has been extensively investigated and mapped for petroleum potential, and is of major importance for understanding the complex geological history of California. Its rocks are mostly highly siliceous strata that vary greatly in composition, stratigraphy, and tectono-stratigraphic history.
Carbon Shift: How Peak Oil and the Climate Crisis Will Change Canada is a 2009 non-fiction book edited by Thomas Homer-Dixon and Nick Garrison that collects six essays that discusses the issues of peak oil and climate change. The book was first published in hardcover by Random House of Canada in 2009 under the title Carbon Shift: How the Twin Crises of Oil Depletion and Climate Change Will Define the Future, and became a national bestseller. In 2010, the paperback was published by Vintage Canada, a division of Random House Canada, the sub-title then changing to How Peak Oil and the Climate Crisis Will Change Canada .
Shale gas in the United Kingdom has attracted increasing attention since 2007, when unconventional onshore shale gas production was proposed. The first shale gas well in England was drilled in 1875. As of 2013 a number of wells had been drilled, and favourable tax treatment had been offered to shale gas producers.
Dario Tamburrano is an Italian environmental activist and one of the first members of the Five Star Movement elected in the European Parliament.
