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Encyclopedia > Landfill gas
Natural gas rig

Natural gas (commonly refered to as gas in many countries) is a gaseous fossil fuel consisting primarily of methane. It is found in oil fields and natural gas fields, as well as - in smaller quantities - in coal beds. Download high resolution version (1057x1050, 731 KB)Natural gas rig. ... Download high resolution version (1057x1050, 731 KB)Natural gas rig. ... Gas (actually, as), the GNU assembler, is the default GCC back-end. ... Coal rail cars in Ashtabula, Ohio Fossil fuels, also known as mineral fuels, are hydrocarbon-containing natural resources such as coal, petroleum and natural gas. ... The simplest hydrocarbon, methane, is a gas with a chemical formula of CH4. ... Drilling rig in a small oil field Near Sarnia, Ontario, 2001 An oil field is an area with an abundance of oil wells extracting petroleum (oil) from below ground. ... Natural gas rig Oil and natural gas are produced by the same geological process: anaerobic decay of organic matter deep under the Earths surface. ... Coal Bed [Coal] consists of more than 50 percent by weight and more than 70 percent by volume of carbonaceous material (including inherent moisture). ...


When methane-rich gasses are produced by the anaerobic decay of non-fossil organic material, these are referred to as biogas. Sources of biogas include swamps (swamp gas), marshes (marsh gas), landfills (landfill gas), sewage sludge and manure (by way of anaerobic digesters) and flatulence (most notably in cows.) Anaerobic is a technical word which literally means without air. ... Decomposition is the reduction of bodies and other formerly living organisms into simpler forms of matter; and most particularly to the fate of the body, after death. ... Organic has several meanings and related topics. ... Biogas typically refers to methane produced by the fermentation of organic matter such as manure under anaerobic conditions. ... A freshwater swamp swamp (disambiguation) A swamp is a wetland that features permanent inundation of large areas of land by shallow bodies of water, generally with a substantial number of hummocks, or dry-land protrusions. ... This article is about marsh, a type of wetland. ... A modern landfill operation. ... Natural gas rig Natural gas (commonly refered to as gas in many countries) is a gaseous fossil fuel consisting primarily of methane. ... The word manure means some types of organic matter used as fertilizer for land. ... Flatulence consists of gases that are produced by symbiotic bacteria and yeasts living in the gastrointestinal tract of mammals and are released through the anus. ... Wiktionary has a definition of: Cow Cow may refer to: Female cattle, other bovines, or other large mammals including elephants and whales. ...


Methane is an extremely efficient greenhouse gas which may contribute to enhanced global warming when free in the atmosphere, and such free methane, would then be considered a pollutant rather than a useful energy resource. However, methane in the atmosphere reacts with ozone, producing carbon dioxide and water, so that the greenhouse effect of released methane is relatively short-lived. As a pollutant, significant biological sources of methane are termites, cows (ruminants) and cultivation (estimated emissions 15, 75 and 100 million tons per year respectively. Increasing CO2 levels Greenhouse gases (GHG) are gaseous components of the atmosphere that contribute to the greenhouse effect. ... Global mean surface temperatures 1856-2004 Global warming is a term used to describe an increase over time of the average temperature of Earths atmosphere and oceans. ... Pollutants are substances which directly or indirectly damage us or the environment. ...


(Landfill gas), which is approximately equal parts methane and carbon dioxide, also contains trace volatile organic compounds (VOCs), many of which are known to be precursors to photochemical smog. Because landfill gas contains these trace compounds, The US Federal Clean Air Act (Part 40 of the Federal Code of Regulations) requires landfill owners to estimate the quantity of VOCs emitted. If the estimated VOC emissions exceeds 50 metric tons, then the landfill owner is required to collect the landfill gas, and treat the landfill gas to remove the entrained VOCs. Usually, treatment is by combustion of the landfill gas. Because of the remoteness of the landfill sites, it is often not economically feasible to produce electricity from the gas. Natural gas rig Natural gas (commonly refered to as gas in many countries) is a gaseous fossil fuel consisting primarily of methane. ... The simplest hydrocarbon, methane, is a gas with a chemical formula of CH4. ... A modern landfill operation. ... Natural gas rig Natural gas (commonly refered to as gas in many countries) is a gaseous fossil fuel consisting primarily of methane. ...

Contents

Chemical composition and energy content

Chemical composition

The primary component of natural gas is methane (CH4), the shortest and lightest hydrocarbon molecule. It may also contain heavier gaseous hydrocarbons such as ethane (C2H6), propane (C3H8) and butane (C4H10), as well as other gases, in varying amounts, see also natural gas condensate. The simplest hydrocarbon, methane, is a gas with a chemical formula of CH4. ... General Name, Symbol, Number Carbon, C, 6 Chemical series Nonmetals Group, Period, Block 14 (IVA), 2, p Density, Hardness 2267 kg/m3 0. ... General Name, Symbol, Number Hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1 (IA), 1, s Density, Hardness 0. ... In chemistry, a hydrocarbon is a group of chemical compounds consisting only of carbon (C) and hydrogen (H). ... Ethane is a chemical compound with chemical formula C2H6. ... General Name, Symbol, Number Carbon, C, 6 Chemical series Nonmetals Group, Period, Block 14 (IVA), 2, p Density, Hardness 2267 kg/m3 0. ... General Name, Symbol, Number Hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1 (IA), 1, s Density, Hardness 0. ... A three-carbon alkane, propane is sometimes derived from other petroleum products during oil or natural gas processing. ... General Name, Symbol, Number Carbon, C, 6 Chemical series Nonmetals Group, Period, Block 14 (IVA), 2, p Density, Hardness 2267 kg/m3 0. ... General Name, Symbol, Number Hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1 (IA), 1, s Density, Hardness 0. ... Butane is the general name for two related alkane hydrocarbon with the molecular formula C4H10: n-butane (1-butane) and iso-butane (i-butane, isobutane, 2-methylpropane). ... General Name, Symbol, Number Carbon, C, 6 Chemical series Nonmetals Group, Period, Block 14 (IVA), 2, p Density, Hardness 2267 kg/m3 0. ... General Name, Symbol, Number Hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1 (IA), 1, s Density, Hardness 0. ... Natural Gas Condensate is a natural gas by-product. ...


Organosulfur compounds and Hydrogen sulfide (H2S see acid gas) are common contaminants, which must be removed prior to most uses. Gas with a signifcant amount of sulfur impurities is termed "sour." This page is a candidate for speedy deletion, because: no useful content If you disagree with its speedy deletion, please explain why on its talk page or at Wikipedia:Speedy deletions. ... For an alternative meaning for H2S, see H2S radar. ... General Name, Symbol, Number Hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1 (IA), 1, s Density, Hardness 0. ... General Name, Symbol, Number sulfur, S, 16 Chemical series nonmetals Group, Period, Block 16 (VIA), 3, p Density, Hardness 1960 kg/m3, 2 Appearance Lemon yellow at STP Atomic properties Atomic weight 32. ... Acid gas or Sour gas, also sour acid gas or acid sour gas, is natural gas which contains up to 20% hydrogen sulfide contaminant by weight and the aromatic hydrocarbons benzene, toluene, mixed xylenes and ethylbenzene. ...


Energy content

Combustion of one hundred cubic feet (1 ccf) of commercial quality natural gas typically yields approximately 1 therm (100,000 British thermal units, 30 kWh). One cubic meter yields 38 MJ (10.6 kWh). Combustion or burning is an exothermic reaction between a substance (the fuel) and a gas (the oxidizer) to release heat. ... The cubic foot (symbols ft³, cu. ... The therm (symbol thm) is a non-SI unit of heat energy. ... The British thermal unit (BTU or Btu) is a non-metric unit of energy, used in the United States and, to a lesser extent, the UK (where it is generally only used for heating systems). ... The kilowatt-hour (symbol: kW·h) is a unit for measuring energy. ... The cubic metre (symbol m³) is the SI derived unit of volume. ...


Storage and transport

Natural gas line

The major difficulty in the use of natural gas is transportation and storage. Natural gas pipelines are economical, but are impractical across oceans. Many existing pipelines in North America are close to reaching their capacity prompting some politicians in colder climates to speak publicly of potential shortages. Liquefied natural gas tankers are also used, but have higher cost and safety problems. In many cases, as with oil fields in Saudi Arabia, the natural gas which is recovered in the course of recovering petroleum cannot be profitably sold, and is simply burned at the oil field (known as flaring). This wasteful practice is now illegal in many countries, especially since it adds greenhouse gas pollution to the atmosphere, and since a profitable method may be found in the future. The gas is instead re-injected back into the ground for possible later recovery, and to assist oil pumping by keeping underground pressures higher. Download high resolution version (1052x1050, 749 KB)Natural gas line. ... Download high resolution version (1052x1050, 749 KB)Natural gas line. ... Liquefied natural gas or LNG is natural gas that has been condensed into a liquid and is stored in tanks. ... A tanker is usually a vehicle carrying large amounts of liquid fuel. ... Drilling rig in a small oil field Near Sarnia, Ontario, 2001 An oil field is an area with an abundance of oil wells extracting petroleum (oil) from below ground. ... Nodding donkey pumping an oil well near Sarnia, Ontario, 2001 Petroleum (from Latin petra – rock and oleum – oil), crude oil, sometimes colloquially called black gold, is a thick, dark brown or greenish flammable liquid, which exists in the upper strata of some areas of the Earths crust. ... Profit is defined as the residual value gained from business operations. ... Evolution of a 2nd degree burn — One hour Evolution of a 2nd degree burn — One day Evolution of a 2nd degree burn — two days In medicine, a burn is a type of injury to the skin caused by heat, electricity, chemicals, or radiation (an example of the latter is sunburn). ... Waste inside a Trash can Waste is unwanted or undesired material left over after the completion of a process. ... Pollution is the release of harmful environmental contaminants, or the substances so released. ... Earths atmosphere is the layer of gases surrounding the planet Earth and retained by the Earths gravity. ... Injection has multiple meanings: In mathematics, the term injection refers to an injective function. ... Recovery is the first e-book and seventh installment of The New Jedi Order series set in the Star Wars galaxy. ... A pump is a mechanical device used to move liquids or gases. ... Pressure is the application of force to a surface, and the concentration of that force in a given area. ...


Natural gas is often stored in underground caverns formed inside salt domes, or in tanks as Compressed Natural Gas (CNG), or Liquefied Natural Gas (LNG). A salt dome is formed when a thick bed of evaporite minerals (mainly salt, or halite) found at depth intrudes vertically into surrounding rock strata, forming a diapir. ... Compressed Natural Gas (CNG) is a substitute for gasoline or diesel fuel. ...


Natural gas crisis

Many politicians and prominent figures in North America have spoken publicly about a possible natural gas crisis. This list includes former Secretary of Energy Spencer Abraham, Chairman of the Federal Reserve Alan Greenspan, Ontario Minister of Energy Dwight Duncan. Spencer Abraham Edward Spencer Abraham (born June 12, 1952 in East Lansing, Michigan) is an American politician. ... Alan Greenspan ( older image) Dr. Alan Greenspan, KBE (born March 6, 1926) is an American economist and Chairman of the Board of Governors of the Federal Reserve of the United States. ... Dwight Duncan (born January 3, 1959 in Windsor, Ontario) is a politician in Ontario, Canada. ...


The natural gas crisis is typically described by the increasing price of natural gas in the U.S. over the last few years due to the decline in indigenous supply and the increase in demand for electricity generation. The price has become so high that many industrial users, mainly in the petrochemical industry, have closed their plants causing loss of jobs. Alan Greenspan has suggested that a solution to the natural gas crisis is the importation of liquified natural gas, or LNG. The supply and demand model describes how prices vary as a result of a balance between product availability at each price (supply) and the desires of those with purchasing power at each price (demand). ... The supply and demand model describes how prices vary as a result of a balance between product availability at each price (supply) and the desires of those with purchasing power at each price (demand). ... The article on electrical energy is located elsewhere. ... A petrochemical is any chemical derived from fossil fuel. ... Alan Greenspan ( older image) Dr. Alan Greenspan, KBE (born March 6, 1926) is an American economist and Chairman of the Board of Governors of the Federal Reserve of the United States. ... Liquified Natural Gas (LNG) is natural gas which has been artificially condensed into a liquid form by a combination of pressurisation and cryogenic cooling. ...


This solution is both capital intensive and politically charged due to the NIMBY syndrom and the public perception that LNG terminals are explosive risks, especially in the wake of the 911 terrorist attacks in the USA. (The security arrangements during the 2004 Democratic Convention in Boston, one of only six LNG terminals in the USA were extraordinarily tight; and are maintained at a high state year round by the US Dept. of Homeland Security.) NIMBY (Not In My Back Yard) is an acronym for the opposition by local residents to construction of intrusive facilities, which are often intended primarily to serve people living far away: such as new roads or rail lines, power plants, waste storage facilities or the like, or intended to serve... This article is about the year 911 A.D. For other uses, see 911 (disambiguation). ... Military personnel have started to guard transportation facilities such as Penn Station as part of homeland security efforts. ...


Infrastructure issues to establish new or expanded LNG terminals are non-trivial, to say the least, especially when taken together with high capitalization needs of each subsystem. LNG terminals require a very spaceous (large) deep (42 ft (38.5 m) or better) harbor well sheltered from wind and wave. These 'suitable' sites are thus deep in well populated seaports, which are also burdened with right of way concerns for LNG pipelines (inland through your backyard, not mine!), or conversely, required to also host the LNG expansion plant facilities and end use (Petrochemical) plants amidst the high population densities of major cities (with the associated fumes, multiple serious risks to safety).


Typically, to attain 'well sheltered' waters, suitable harbor sites are well up rivers or estuaries, whereas these same sites are unlikely to be dredged deep enough. Since these superlarge vessels must move slow and ponderously in restricted waters - by definition in all and any harbor - the transit times to and from the terminal become costly, as multiple tugs and security boats shelter and safewguard these gargantuan behemoths. Operationally, LNG tankers are (Boston) effectively given sole use of the harbor, forced to arrive and depart in the wee hours of the night-morning cycle, and precluded from occupying the same harbor until the first is well departed. These are not factors that aide profitability and attract capital investment.


Uses

Power generation

Natural gas is important as a major source for electricity generation through the use of gas turbines and steam turbines. Particularly high efficiencies can be achieved through combining gas turbines with a steam turbine in combined cycle mode. Environmentally, natural gas burns cleaner than other fossil fuels, such as oil and coal, and produces less greenhouse gases. For an equivalent amount of heat, burning natural gas produces about 30% less carbon dioxide than burning petroleum and about 45% less than burning coal. [1] (http://www.naturalgas.org/environment/naturalgas.asp#greenhouse) Combined cycle power generation using natural gas is thus the cleanest source of power available using fossil fuels, and this technology is widely used wherever gas can be obtained at a reasonable cost. Fuel cell technology may eventually provide cleaner options for converting natural gas into electricity, but as yet it is not price-competitive. Itaipu Dam is a hydroelectric generating station Electricity generation is the first process in the delivery of electricity to consumers. ... The worlds first commercial, oil-free gas turbine is manufactured by Capstone. ... In physical chemistry and in engineering, steam refers to vaporized water. ... WWII era ship propulsion turbine A turbine is a rotary engine that extracts energy from a fluid flow. ... In a combined cycle power plant, a gas turbine generator is combined with a steam turbine power plant with the objective to increase the efficiency of electricity generation. ... An environment is a complex of external factors that acts on a system and determines its course and form of existence. ... Coal rail cars in Ashtabula, Ohio Fossil fuels, also known as mineral fuels, are hydrocarbon-containing natural resources such as coal, petroleum and natural gas. ... Increasing CO2 levels Greenhouse gases (GHG) are gaseous components of the atmosphere that contribute to the greenhouse effect. ... Carbon dioxide is an atmospheric gas composed of one carbon and two oxygen atoms. ... Nodding donkey pumping an oil well near Sarnia, Ontario, 2001 Petroleum (from Latin petra – rock and oleum – oil), crude oil, sometimes colloquially called black gold, is a thick, dark brown or greenish flammable liquid, which exists in the upper strata of some areas of the Earths crust. ... Coal is a fossil fuel extracted from the ground either by underground mining, open-pit mining or strip mining. ... A fuel cell is an electrochemical device similar to a battery, but differing from the latter in that it is designed for continuous replenishment of the reactants consumed; i. ...


Natural gas vehicles

Compressed natural gas (and LPG) is used as a clean alternative to other automobile fuels. As of 2003, the countries with the largest number of natural gas vehicles were Argentina, Brazil, Pakistan, Italy, and India. Compressed Natural Gas (CNG) is a substitute for gasoline or diesel fuel. ... Liquified Petroleum Gas (also called Liquefied Petroleum Gas, Liquid Petroleum Gas, LPG, or LP Gas) is a mixture of hydrocarbon gases used as a fuel in heating appliances and vehicles, and increasingly replacing fluorocarbons as an aerosol propellant and a refrigerant to reduce damage to the ozone layer. ... A small variety of cars, the most popular kind of automobile. ... 2003 is a common year starting on Wednesday of the Gregorian calendar, and also: The International Year of Freshwater The European Disability Year Events January events January 1 Luíz Inácio Lula Da Silva becomes the 37th President of Brazil. ... A Natural gas vehicle or NGV is a vehicle that uses compressed natural gas (CNG) or, less commonly, liquified natural gas (LNG)) as a clean alternative to other automobile fuels. ...


Residental domestic use

Many stoves use natural gas.

Natural gas is supplied to homes where it is used for such purposes as cooking and heating/cooling. CNG is used in rural homes without connections to piped-in public utility services, or with portable grills. Wikipedia does not have an article with this exact name. ... Wikipedia does not have an article with this exact name. ... A stove is a heat-producing device. ... Cooking is the act of preparing food for consumption. ... HVAC may also stand for High-voltage alternating current HVAC is an initialism that stands for heating, ventilation and air-conditioning. This is sometimes referred to as climate control. ... Heat flow along perfectly insulated wire Conduction is the transfer of heat or electric current from one substance to another by direct contact. ... Rural areas are sparsely settled places away from the influence of large cities and towns. ... Plumbing, from the Latin for lead (plumbum), is the trade of working with pipes for water, drainage and natural gas. ... A public utility is a company that maintains the infrastructure for a public service. ... This article is about the cooking surface or compartment called a grill or griller. ...


Fertilizer

Natural gas is a major feedstock for the production of ammonia, via the Haber process, for use in fertilizer production. Ammonia is a chemical compound with the formula NH3. ... The Haber Process (also Haber-Bosch process) is the reaction of nitrogen and hydrogen to produce ammonia. ... Fertilizers are chemicals given to plants with the intention of promoting growth; they are usually applied either via the soil or by foliar spraying. ...


Other

Natural gas is also used in the manufacture of fabrics, glass, steel, plastics, paint, and other products.


Sources

Natural gas is commercially produced from oil fields and natural gas fields. Drilling rig in a small oil field Near Sarnia, Ontario, 2001 An oil field is an area with an abundance of oil wells extracting petroleum (oil) from below ground. ... Natural gas rig Oil and natural gas are produced by the same geological process: anaerobic decay of organic matter deep under the Earths surface. ...


Possible future sources

One experimental idea is to use the methane gas that is naturally produced from landfills to supply power to cities. Tests have shown that methane gas could be a financially sustainable power source. A modern landfill operation. ...


There are plans in Ontario to capture the methane gasses rising from the manure of cattle caged in a factory farm and to use that gas to provide power to a small town.


There is also the possibility that with the source separation of organic materials from the waste stream that by using an anerobic digester, the methane can be used to produce useable energy. This can be improved by adding other organic material (plants as well as slaughter house waste) to the digester.


Safety

In any form, a strong bad scent (such as ethanethiol) is deliberately added to the otherwise colorless and odorless gas, so that leaks can be detected by the smell before an explosion occurs. In mines, sensors are used and mining apparatus has been specifically developed to avoid ignition sources (e.g. the Davy lamp). Adding scent to natural gas began after the 1937 New London School explosion. The buildup of gas in the school went unnoticed, and killed three hundred students and faculty when it ignited. Olfaction, the sense of smell, is the detection of chemicals dissolved in air (or, by animals that breathe water, in water). ... Ethyl mercaptan (IUPAC name - ethanethiol) is a colorless liquid that has a strong odor, resembling that of rotten eggs. ... Color is an important part of the visual arts. ... Odor receptors on the antennae of a Luna moth An odor (American English) or odour (Commonwealth English) is the object of perception of the sense of olfaction. ... Olfaction, the sense of smell, is the detection of chemicals dissolved in air (or, by animals that breathe water, in water). ... The El Chino Mine located near Silver City, New Mexico is an open-pit copper mine Mining is the extraction of valuable minerals or other geological materials from the earth, usually (but not always) from an ore body, vein, or (coal) seam. ... A sensor is a technological device or biological organ that detects, or senses, a signal or physical condition. ... The Davy lamp is a safety lamp devised in 1815 by Humphry Davy. ... The New London School explosion occurred on March 18, 1937, when a natural gas leak caused an explosion, destroying the New London School of the city of New London, Texas. ...


Explosions caused by natural gas leaks occur a few times each year. Individual homes and small businesses are most frequently affected when an internal leak builds up gas inside the structure. Frequently, the blast will be enough to significantly damage a building but leave it standing. In these cases, the people inside tend to have minor to moderate injuries. Occasionally, the gas can collect in high enough quantities to cause a deadly explosion, disintegrating one or more buildings in the process. The gas usually dissipates readily outdoors, but can sometimes collect in dangerous quantities if weather conditions are right. Considering the tens of millions of structures that use the fuel, the risks of using natural gas are very low. Home is a word that a person identifies with a place they live, spend much of their time, or feel generally comfortable with. ... A small business may be defined as a business with a small number of employees. ... Injury is damage or harm caused to the structure or function of the body caused by an outside agent or force, which may be physical or chemical. ... Composite satellite image showing the progress of a hurricane weather system approaching the east coast of America Weather comprises all the various phenomena that occur in the atmosphere of a planet. ...


Contrary to popular belief, natural gas is non-toxic, though some gas fields yield 'acid gas' or 'sour gas' containing hydrogen sulfide. This untreated gas is toxic. Acid gas or Sour gas, also sour acid gas or acid sour gas, is natural gas which contains up to 20% hydrogen sulfide contaminant by weight and the aromatic hydrocarbons benzene, toluene, mixed xylenes and ethylbenzene. ... Acid gas or Sour gas, also sour acid gas or acid sour gas, is natural gas which contains up to 20% hydrogen sulfide contaminant by weight and the aromatic hydrocarbons benzene, toluene, mixed xylenes and ethylbenzene. ... For an alternative meaning for H2S, see H2S radar. ...


Extraction of natural gas (or oil) leads to decrease in pressure in the reservoir. This in turn may lead to subsidence at ground level. Subsidence may affect ecosystems, waterways, sewer and water supply systems, foundations etc. Pressure is the application of force to a surface, and the concentration of that force in a given area. ... Generally, a reservoir is something that can hold matter or energy. ... Subsidence is a term used in geology, engineering and surveying to denote the motion of a surface (usually, the earths surface) downwards relative to a datum such as sea-level. ... In ecology, an ecosystem is a naturally occurring assemblage of organisms (plant, animal and other living organisms—also referred to as a biotic community or biocoenosis) living together with their environment (or biotope), functioning as a unit of sorts. ... Sewers transport wastewater from buildings to treatment facilities. ... A water supply system provides water to the locations that need it. ... A foundation is a structure that transmits loads from a building to the underlying ground. ... ETC can refer to: Electronic toll collection Electronic throttle control Et cetera Electronic Theatre Controls ATM card service by HSBC and Hang Seng Bank only for withdrawal of money from bank account This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same...


See also

Energy development is the ongoing effort to provide abundant and accessible energy, through knowledge, skills and constructions. ... Carbon dioxide is an atmospheric gas composed of one carbon and two oxygen atoms. ...

External links

Natural gas vehicles

  • International Natural Gas Vehicle Statistics (http://www.iangv.org/jaytech/default.php?PageID=130)

North America

South Asia

  • Pakistan: Conversion to CNG up 64% from last year (http://www.dailytimes.com.pk/default.asp?page=story_18-1-2004_pg5_4)
  • Pakistan: Daily Times stories about cheap ($2000 - $3000) CNG cars: [2] (http://www.dailytimes.com.pk/default.asp?page=story_27-12-2003_pg5_9) [3] (http://www.dailytimes.com.pk/default.asp?page=story_20-3-2004_pg5_5)
  • India: How New Delhi used CNG to ease pollution (http://cities.expressindia.com/fullstory.php?newsid=85665)

Pollution and allergy


  Results from FactBites:
 
Electricity from Landfill Gas (565 words)
Landfill gas is collected from landfills by drilling "wells" into the landfills, and collecting the gases through pipes.
Landfill gas may also be used in fuel cell technologies, which use chemical reactions to create electricity, and are much more efficient than combustion turbines.
Landfill gas generators produce nitrogen oxides emissions that vary widely from one site to another, depending on the type of generator and the extent to which steps have been taken to minimize such emissions.
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