Here are the climate-related sections of speeches by MPs during the Commons debate Geo-engineering and the Environment.
14:50 Roz Savage (Liberal Democrat)
Geo-engineering is a broad term used to describe a range of large-scale interventions in Earth’s climate system, so I will start by clarifying a couple of definitions. Geo-engineering falls into two main categories: carbon dioxide removal and solar radiation management. The petition calls for a pre-emptive ban on both. CDR is about drawing carbon out of the atmosphere and can involve technology such as carbon capture, or nature-based solutions such as restoring forests, peatlands and grasslands. I have absolutely no problem with the latter. Trees do not need subsidies, peatlands do not break, and healthy soils not only store carbon but improve water quality, mitigate flooding and support biodiversity. They are our natural allies in the fight against climate change.
SRM is a different matter. It aims to reflect sunlight back into space by various means, such as using aerosols sprayed into the stratosphere, whitening clouds or even placing mirrors in orbit. SRM does not remove carbon. It does not stop ocean acidification. It does not reduce fossil fuel use. It masks the symptoms while the root cause, our fossil fuel carbon emissions, goes unchecked. Whatever options we consider as we confront the climate crisis, we must not be distracted from our overriding mission to tackle the key cause of climate change: our reliance on fossil fuels.
We must consider the human cost of climate change and any measures that we might take to mitigate it. Who decides the thermostat setting? Who gets more rain, and who goes without? Can we even control these things? The risks of failing to invest in technology to tackle the root causes of climate change threaten serious regional disruption. As always, it will almost certainly be the poorest and least responsible for the crisis who bear the brunt of the fallout.
Some will argue that we are still doing too little, too late to mitigate climate change, and I agree with them, but that does not mean that SRM is the right answer. SRM could take us out of the frying pan and into the fire. Instead of reaching for techno fixes, we need to do what we already know works: cut fossil fuel use, restore nature and—gosh—maybe even look at changing our behaviour, because at some point, sooner or later, behaviour change must be part of the picture. If we are honest, none of the technologies yet available to us—not even the most advanced forms of carbon removal—can keep pace with our current levels of consumption.
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16:49 Pippa Heylings (Liberal Democrat)
Over just one weekend, we have seen our vulnerability to extreme weather conditions as a result of our failure to tackle climate change, and our vulnerability as a result of our dependence on global fossil fuels supply and prices. That underlines, once again, our need to strengthen our home-grown energy security and reduce our polluting emissions by accelerating investment in renewables and clean, green energy. Our emissions are not falling fast enough, and we are not on track to meet our legally binding climate targets. The world is set to surpass 1.5° of warming in the next decade. That is the context in which the petition was brought forward.
We need to address the root causes of climate breakdown, as my hon. Friend the Member for South Cotswolds (Dr Savage) said. The Climate Change Committee was clear last year that only a third of the emissions reductions required to achieve the country’s climate targets are currently covered by credible plans. Although it is true that our emissions are now less than half the levels they were in 1990, largely due to the phase-out of coal and the ramping up of renewables, we will now need ambitious action not just in the energy sector but across transport, buildings, industry and agriculture. The plans left by the previous Government did not deliver enough action, so we must do more. Nevertheless, even with aggressive investment in renewables and actions to decarbonise key sectors, we will still have to deal with residual emissions from heavy industries, particularly aviation, shipping and steel.
The balanced pathway, developed in the Climate Change Committee’s seventh carbon budget, tries to reduce emissions across all sectors of the economy as far as credibly possible, in line with cost effectiveness and feasibility constraints, minimising the use of engineered removals. However, even the committee recognises that we need to go beyond cutting emissions and to start work on the engineered removal of greenhouse gases from the atmosphere. That is why removals are part of the Government’s net zero strategy.
As we have heard, geo-engineering refers to deliberate, large-scale projects to reduce carbon and cool the Earth’s climate system to address climate change. In greenhouse gas removal terms, that also includes direct air carbon capture and storage and bioenergy with carbon capture and storage, some of which we are already using. We have seen sizeable investments from the Government into carbon capture storage. That could accommodate large-scale BECCS and DACCS, which clearly will be dependent on carbon capture and storage, but that is a measure of last resort for those hard-to-decarbonise sectors.
Living in South Cambridgeshire, I am close to the border with Cambridge. Since 2019, under climate expert Professor Sir David King, the University of Cambridge has been undertaking some important research into greenhouse gases at the Centre for Climate Repair. Among other things, it has been looking at something that brings climate and nature approaches together into balance again, such as marine biomass regeneration, which aims to restore whale populations, and ocean biomass to boost nutrient recycling and phytoplankton growth, because healthier oceans can naturally absorb more carbon dioxide and support global climate goals.
The centre has also been looking at the role of giant kelp, which grows rapidly and captures large amounts of carbon dioxide. When it sinks to the ocean floor, it stores carbon for the long term, offering a powerful, nature-based carbon removal method. Those are just two of the types of approaches that are being investigated. Quite rightly, the Government funded an independent review of greenhouse gas removal approaches, led by former MP Dr Alan Whitehead, covering nature-based solutions and engineered removals, such as direct air capture.
We saw in the Government’s response to the e-petition that they are currently working with the British Standards Institution to develop greenhouse gas removal methodologies, some of which may use sustainable biomass and require coming up with biomass sustainability criteria. There are some ways in which we could see greenhouse gas removal as a kind of guardrail for helping to decarbonise the atmosphere.
Geo-engineering is not a silver bullet. It must never be used as an excuse to delay decarbonisation through embracing and investing in renewables. We must remember that the first stop in our fight against climate change and securing energy security is investment in the transition to renewable and clean energy. Any amount of greenhouse gas removal will ultimately compromise the fight against climate change. As Dr Vaughan from the Tyndall Centre for Climate Change said:
“SRM methods do not address the causes of climate change”.
However, a blanket ban on geo-engineering, as the motion proposes, would be short-sighted and self-defeating as we explore the other methods that I have discussed. Let us therefore champion governance built on transparency for any kind of research and standards in geo-engineering and climate action, which is ambitious and grounded in our transition to home-grown clean, green energy.
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16:51 Nick Timothy (Conservative)
The hon. Member for South Cambridgeshire (Pippa Heylings) used the opportunity to speak about climate change. Although she and I probably disagree profoundly about the wisdom of the net zero target and the plan to decarbonise the whole grid by 2030, I am sure she opposes, as I do, the giant solar and battery farms that the Government want to impose on both our constituencies and most of the east of England.
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16:54 Kerry McCarthy (Labour)
Geo-engineering is a term commonly used to refer to two groups of technologies, as has been mentioned: greenhouse gas removals and solar radiation modification. Those are two very separate, very different approaches to addressing climate change, and the UK has two very separate, very different positions on their use. Greenhouse gas removals actively remove greenhouse gases—predominantly carbon dioxide—from the atmosphere for highly durable storage, resulting in negative emissions. They are vital to achieving net zero, and we support their deployment. Solar radiation modification, on the other hand, describes a set of interventions that aim to cool the earth, largely by reflecting some of the sun’s energy back into space.
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Kerry McCarthy (Labour)
On the supposed chemtrails issue, that is a term used by some people who claim that the white trails seen behind high-altitude aircraft on clear days contain undisclosed chemical agents intended for a covert atmospheric spraying programme. They are, in fact, as my hon. Friend said, contrails, which form when warm, moist aircraft exhaust fumes mix with cold air at altitude. Under certain atmospheric conditions, contrails can persist and spread out to form cirrus-like clouds before disappearing. There is no deliberate spraying of chemicals in the skies over the UK for climate modification. We are not in favour of SRM and have no plans to change that position; I will say more on that in a moment, but first I want to add a little more on greenhouse gas removals.
Making Britain a clean energy superpower is one of the five missions of this Government, delivering clean power by 2030 and accelerating progress towards net zero across the economy by 2050. I note the comments from the hon. Member for South Cambridgeshire (Pippa Heylings) about the UK being off track to do that. We will be publishing our carbon budget delivery plan by October; as she said, the previous Government were taken to court for failing to produce adequate policies to match the ambition. Obviously, there is no point in setting targets unless they can be delivered. We will set out our plan in due course, and then talk about the seventh carbon budget and meeting our nationally determined contributions.
We must do everything we can to reduce greenhouse gas emissions—that is our starting point. We need that effort to be shared across all Government Departments, and we need everyone to play a role.
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16:58 Angus MacDonald (Liberal Democrat)
I hope this is not too much of a diversion, but the Minister will know that mains gas is 6p per kWh, largely imported and certainly a carbon fuel, while renewable energy is selling at 24p per kWh. We cannot get the public behind us as long as the environmental tariffs are on the renewable energy and not on the carbon fuel. May I have her opinion on that?
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16:58 Kerry McCarthy (Labour)
I will not be tempted too far down that path, other than to say that it is very much on our radar. We know that renewables are the cheaper option, but that needs to be reflected in the prices that people are charged. Today, we announced measures in our industrial strategy to bring down energy prices for industry as part of industrial decarbonisation, but on the consumer side it is a work in progress, and the hon. Gentleman can expect to hear more soon.
The starting point is reducing emissions. We know that emissions are hard to abate in some sectors, and that we will not be able to do it fully. Greenhouse gas removal technologies will therefore be important to balance those residual emissions. That is recognised internationally by the Intergovernmental Panel on Climate Change and by our independent Climate Change Committee, whose latest advice to Government for setting the seventh carbon budget modelled around 36 megatonnes a year of engineered removals by 2050 to help us reach net zero.
Greenhouse gas removal approaches fall broadly into two categories: nature-based approaches, such as afforestation; and engineering-based approaches, such as direct air carbon capture and storage, bioenergy with carbon capture and storage, biochar, and enhanced rock weathering.
We are in the middle of London Climate Action Week, and many visitors from Brazil are talking about what they seek to do for their tropical forests’ “forever facility” at COP30. I was excited to hear what the hon. Member for South Cambridgeshire said about whales and giant kelp, as I have been talking to my officials about the role they play—it is good to have scientific back-up for my views. During London Climate Action Week, we are focusing on the important role of the voluntary carbon and nature markets in securing investment for blue carbon and our forests.
Access to carbon capture, usage and storage infrastructure is vital for many GGR technologies, and the Government are supporting the development of the CCUS network by allocating £9.4 billion in capital budgets over the spending review period. The network needs regulation, and we have an established environmental regulatory regime, with several regulators evaluating the environmental impact of GGR and CCUS projects.
I make it clear for the record that the Government are not deploying solar radiation modification and have no plans to do so. There will be no spraying of chemicals in the skies over the UK for SRM, geo-engineering or climate remediation. Our priority is to reduce greenhouse gas emissions from human activities and to adapt to the unavoidable impacts of climate change.
ARIA is an independent research body that was set up by the Department for Science, Innovation and Technology. Although it is sponsored by that Government Department, it has complete autonomy on its project choices, which goes to the point about whether that is the best use of public money, as ARIA is responsible for its own choices. It is conducting cautious, controlled research aimed at improving the understanding of SRM risks and impacts, but it is not deploying SRM technologies. I say again that its research will not release any toxic materials, nor will it alleviate the urgent need for increased decarbonisation efforts. There is no substitute for decarbonisation, which is why we are pressing on with our missions for clean power and net zero.
The science is clear that, without rapid action, we risk irreversible damage to the planet’s biosphere. To halt global warming, the world needs to reach net zero greenhouse gas emissions, which includes the UK’s emissions. I hope I have reassured the hon. Members present, and the constituents they represent, that the Government are not deploying SRM technologies and have no plans to do so, and that the environmental impacts of greenhouse gas removal technologies—the other wing of geo-engineering—will continue to be monitored as those technologies scale up in the UK.
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17:08 Roz Savage (Liberal Democrat)
I will wrap up with a personal reflection. During my years of rowing solo across oceans to raise awareness of our climate and nature issues, I learned the hard way that we cannot fight mother nature. We cannot flout her laws and expect to win. Ultimately, she always has the final word, and the wiser path is to work with her. I hope that we will continue to emphasise nature-based solutions, as we can never go wrong with those. I fully appreciate that this is a climate emergency and that urgent action is needed, but let us not forget that mother nature can also be our greatest ally. We urgently need to act, not with hubris, but with humility, courage and care for the wellbeing of future generations.
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