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Biogas

​Biogas is a gaseous renewable energy source[1] produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste, wastewater, and food waste. Biogas is produced by anaerobic digestion with anaerobic organisms or methanogens inside an anaerobic digester, biodigester or a bioreactor.[2] The gas composition is primarily methane (CH

4) and carbon dioxide (CO

2) and may have small amounts of hydrogen sulfide (H

2S), moisture and siloxanes. The methane can be combusted or oxidized with oxygen. This energy release allows biogas to be used as a fuel; it can be used in fuel cells and for heating purpose, such as in cooking. It can also be used in a gas engine to convert the energy in the gas into electricity and heat.[3]

After removal of carbon dioxide and hydrogen sulfide it can be compressed in the same way as natural gas and used to power motor vehicles. In the United Kingdom, for example, biogas is estimated to have the potential to replace around 17% of vehicle fuel.[4] It qualifies for renewable energy subsidies in some parts of the world. Biogas can be cleaned and upgraded to natural gas standards, when it becomes bio-methane. Biogas is considered to be a renewable resource because its production-and-use cycle is continuous, and it generates no net carbon dioxide. From a carbon perspective, as much carbon dioxide is absorbed from the atmosphere in the growth of the primary bio-resource as is released, when the material is ultimately converted to energy.

​Bournemouth (/ˈbɔːrnməθ/ ⓘ BORN-məth) is a coastal resort town on the south coast in the Bournemouth, Christchurch and Poole unitary authority area in the ceremonial county of Dorset, England. The town's urban subdivision had a population of 187,503 at the 2011 census making it the largest town in the county; the town is part of the South East Dorset conurbation, which has a population of 465,000.

Founded in 1810 by Lewis Tregonwell, in an area of deserted heathland occasionally visited by fishermen and smugglers, as a health resort,[1] Bournemouth became a town in 1870, with growth from the arrival of the railway. Bournemouth lies in the historic county of Hampshire. Following the local government reorganisation in 1974 the town was transferred to the county of Dorset, governed by Dorset County Council. Although the borough gained unitary authority in 1997, it retained Dorset's ceremonial county functions and emergency services. In April 2019, the borough was replaced by the current borough, also with unitary authority status, governing the town, Poole, Christchurch and surrounding areas.

Victorian architecture is notable in the town centre. The 202-foot (62 m) spire of St Peter's Church, one of three Grade I listed churches in the borough, is a local landmark. The town's location has made it a popular destination for tourists, attracting over five million visitors annually with its beaches and popular nightlife. It is also a regional centre of business, home of the Bournemouth International Centre (BIC) and a financial sector that is worth more than £1 billion in gross value added.

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