Most of the UK's eletricity comes from thermal power stations (Gas 40%, Coal 33% and Oil 1.12%). A modern nuclear power station emits 16tonnes of CO2 per megawatt hours,compared with 356 tonnes for gas and 891 for coal. Nuclea power stations are cleaner in terms of greenhouse gas emissions but they cost a grreat deal to build and then need to deal with their radioactive waste. THis means they are more expensive once decommissioning costs are included in costing. France generates 75% of its energy by nuclear energy and this means the British Government is likely to replace older nuclear stations as they reach the end of their life.
THe energy industry is under increasnig pressure to reduce emissions of greenhous gases. CO2 emissions in the UK were 500tonnes in 2005. Some reductions will be acheivved by CCS, which is gainging growing attention among power and oil producers. One possibility could be to store CO2 under the North Sea.
Disused oil fields had the capacity to store upto 10years worth of the UK's total annual carbon emissions and old gas fields could hold 30years. Salt rich layers of rock beneath the sea floor (saline aquifers) can trap CO2 pumped down into them. At the moment, dumping CO2 in the North Sea is prohibited, but the UK government is pursuing amednments to relevent laws so CCS projects can be approved
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