Energy

Why gas isn’t the answer to climate change

November 23, 2012

Africa

November 23, 2012

Africa
Keith Allott

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Keith Allott is Head of Climate Change at WWF-UK, where he leads a team working on UK and EU climate change and energy policy, international climate negotiations, aviation policy and climate change adaptation. He has worked particularly closely on issues such as the UK Climate Change Act, energy policy, the EU emissions trading scheme and global carbon markets. Before joining WWF in 2006, Keith spent much of his career working in various senior editorial roles for ENDS, the leading UK and EU publisher of environmental intelligence for business. He also worked for the UK's Royal Commission on Environmental Pollution, including contributing to its influential report in 2000 on Energy and the Environment.

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Listening to the optimists in the gas industry, you would think that the world is on the cusp of a “shale gas revolution” which will tackle climate change, keep down energy bills and enhance energy security.

Large parts of the UK Government – including, it seems, Chancellor George Osborne – are keen to promote a vision of the UK as a “gas hub” and reposition gas as a wonder fuel. Unfortunately, this new storyline pays little respect to the facts.

The UK, for example, is now dependent on imports for 65% of its gas supplies and this is set to increase despite any future shale gas production. So any claim that more gas dependence is good for energy security looks highly dubious. Unlike renewable energy, where costs are declining rapidly, gas prices are expected to rise. Deutsche Bank said that shale gas is unlikely to be a game-changer, concluding that “we do not expect the impact of shale-gas production on EU gas prices to be anywhere near as great as has been the case with US shale-gas production”.

On the climate question, there are valid concerns about leaking, venting and flaring of gas at various stages of the extraction process. Setting these to one side, the carbon intensity of power generation from gas is around half that from coal. The UK’s ‘dash for gas’ in the 1990s and rapid shale gas expansion in the US have both helped to cut those countries’ emissions by displacing some coal generation, although expansion of renewables and economic downturn also contributed in the US case. Environmental NGOs aren’t blind to these potential carbon savings but the latter are nowhere near enough to address the threat of climate change, let alone meet the internationally agreed objective of limiting the average global temperature rise to less than 2 degrees.

To illustrate the point, the International Energy Agency’s “Golden Age of Gas” report compared two alternative energy scenarios, one of which sees a rapid expansion of unconventional gas production. In this scenario, global temperatures rise by at least 3.5 degrees – which would be devastating for people and nature. The difference in levels of warming between emissions in this scenario and one in which unconventional gas expansion is much slower and gas prices are higher is negligible.

So why does this gas scenario fail to deliver significant carbon savings? In the IEA’s report, more unconventional gas leads to lower gas prices. This leads to less investment in energy efficiency and genuinely low carbon forms of generation which offsets the majority of the savings made by gas.

The gas industry used to describe gas as a “bridging” fuel – it now talks of it as a “destination”, while renewable energy is frequently portrayed as an emerging niche that cannot deliver at scale. Yet according to the UN Environment Programme, in 2011 investment in renewable power sources rose to $257 billion and non-hydro renewables accounted for 44% of all new power capacity. Quite simply, we should see the gas industry’s self-promotion for what it is: a turkey voting against Christmas.

Only with decisive policies by governments to dramatically improve energy efficiency and attract investment in low carbon generation such as renewables can we have a hope of limiting temperature rises to 2 degrees. And as the IEA’s most recent World Energy Outlook made clear, the vast majority of all fossil fuel reserves – coal, oil and gas – need to stay safely in the ground. Dashing to develop new reserves is steering the world towards a massive climate crash, and risks creating hugely expensive stranded assets.

Dr Fatih Birol, Chief Economist of the IEA, remarked earlier this year that "a golden age for gas is not necessarily a golden age for the climate”.  He is spot on.

This post is part of a series for the Global Energy Conversation, supported by Shell. For more information, visit the Global Energy Conversation website

The views and opinions expressed in this article are those of the authors and do not necessarily reflect the views of The Economist Intelligence Unit Limited (EIU) or any other member of The Economist Group. The Economist Group (including the EIU) cannot accept any responsibility or liability for reliance by any person on this article or any of the information, opinions or conclusions set out in the article.

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