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'Smart dash for gas' recommended in new report
Shale gas extraction should make up part of a “dash for smart gas” to replace coal power according to the Grantham Institute
A “dash for smart gas” to replace coal power, including from "fracking", should play a part in carbon reduction efforts, according to a new report.
But the report from the Grantham Institute on Climate Change and the Environment at LSE warned it would be risky to assume gas prices will be low in the coming years or that the UK has extensive supplies of shale gas – extracted through the controversial process of fracking.
It also noted the use of gas was a short-term fix and that gas-fired power stations could only play a significant role in generating electricity beyond 2030 if they are fitted with carbon capture technology to trap and store their emissions.
Supporters of shale gas claim it could provide large supplies of gas which could reduce prices and provide energy security through domestic production.
But while the authors agree the potential of shale gas is worth investigating they say the scale of extraction in the UK could be constrained not only by the size of the resource and the cost of exploiting it, but also public concerns about its environmental and social impacts.
The report's authors said: "Analysis reveals that substantial investment in gas on the assumption of low prices and large unconventional reserves is a risky option.
"A lower risk option would be a 'dash for smart gas', where natural gas is used judiciously in those areas where it offers the greatest value in decarbonising the power sector."
Chancellor George Osborne has provoked controversy with moves that signalled a new "dash for gas" including proposing tax relief for shale gas exploitation, and a gas generation strategy backing use of the fossil fuel for electricity.
But critics fear the process of fracturing of shale rock with high-pressure liquid to release the gas risks earthquakes and pollution of water supplies, and that gas wells could blight the countryside and affect house prices.
There are also concerns that a continuing reliance on gas will make it harder and more expensive to meet climate change goals to reduce greenhouse gas emissions.
The study’s authors said: "In the short run, the UK's emissions can be reduced by replacing coal-fired power stations with those fuelled by natural gas, which emit less than half the carbon dioxide per kilowatt-hour of coal-fired plants.
"But in the medium to long term, a heavy reliance on gas-fired power stations with unabated emissions would hinder the decarbonisation of the UK's power sector."
The Government has raised the possibility of relaxing "carbon budgets" for reducing emissions in the 2020s so that more natural gas can be burned to make electricity.
But the report from the Grantham Institute warned that doing so could make it more expensive to cut carbon from the economy, because it will have to be done more quickly to meet legally-binding goals to slash emissions by 80 per cent by 2050.
The study also warned low gas prices were not guaranteed in the future, with some estimates suggesting prices were more likely to rise than fall in the UK and Europe in the next 20 years.
If gas prices fall, for example as the result of an increase in supplies from unconventional sources such as shale, it could be good for the UK economy, but relying too heavily on gas could turn out to be inconsistent with the Government's aim to insulate the economy from energy cost rises by diversifying supply, the report said.
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