Energy Bill [HL]

Viscount Hanworth Excerpts

Committee stage
Wednesday 7th September 2022 Lords Chamber

[Lord Howell of Guildford (Con)]

My Lords, I am very pleased that the mover and seconder of this amendment have mentioned direct air capture, because sometimes there is confusion between carbon capture and storage and the actual absorption of carbon out of the atmosphere on an enormous scale. Frankly, this is where the big impact will be made in future.

I know that we have made efforts with carbon capture and storage on and off over the years. There is a theoretical idea that finding a way to cheaply cap every chimney of the 9,000 coal-fired stations across Asia and Africa and pipe away the carbon might solve some problems and make a small impact on the overall rising greenhouse gases. However, the most sizeable absorption of carbon that is already in the atmosphere is through direct air capture and climate recovery.

Schemes are already being developed with the input and encouragement of Imperial College and other sources—and in other countries—for developing direct air capture on an absolutely enormous scale. Of course, we cannot do this alone; this is part of an international rescue, if you like, in a way that really begins to give some hope that emissions can be offset so that we can start getting some leverage and control on the overall carbon in the atmosphere. Without this, we will undoubtedly miss all the Paris targets and everyone throughout the world will face very dramatic and increased climate violence, very cold winters and very hot summers.

So I hope that the Minister will indicate that this area is in the Government’s mind and that the development of huge carbon sinks can commence—for instance, in deserts across the world that have already been designated as uninhabited areas. Carbon can be sunk into gigantic lakes the size of Wales or Dubai, or four times the size of London. These vast new developments would offset the overacidity of the ocean. These things can be done. Carbon can be captured and used. CO₂ is a fantastic promoter and fertiliser of food on a colossal scale, and if we are moving into an era of world food shortage, covered areas fed by carbon from huge carbon sinks will really begin to make some impact on the scene.

The other development for carbon sinks is that we could just plant a lot of trees, but that is not very good. Trees are moderate absorbers of carbon although, of course, if they go up in flames they put all the carbon back into the atmosphere straightaway. The real development comes from mangrove groves, which are 16 times more absorbent of CO₂ than other trees. They can be promoted along with saltwater and freshwater lakes in areas where there is a lot of sun and where electricity is therefore virtually costless. Of course, this is at or near the equator. These are the schemes that will save us all and which our Government should be leading in developing by thinking about and backing the necessary legislation. Please, can we have a little more thought on this excellent amendment and the ideas behind it?

[Viscount Hanworth (Lab)]

I wish to express my support for Amendments 39 and 49. I have been looking for a place to make my interjection, which ought to have been encapsulated in an amendment, but perhaps I should propose an amendment at Report. However, now is as good a time as any to air my suggestions.

Aviation contributes significantly to emissions of carbon dioxide. These emissions do not approach the level attributable to road transport but, nevertheless, they must be eliminated. It may be possible to replace short-haul aircraft with aircraft that depend on battery power, but long-haul aviation cannot be electrified. It will continue to depend on liquid fuels. It has been suggested that the fuel could be liquefied hydrogen, but this seems be impractical. Conventional hydrocarbon fuels have an energy density that greatly exceeds that of hydrogen, which is difficult to store in a liquid state and demands considerable storage space. Jet engines that burn hydrogen have not yet been developed.

It seems that hydrocarbon fuels must continue to be used in long-haul aviation. Eventually, this will be acceptable only if the carbon element of these fuels can be sequestered from the atmosphere and the hydrogen element of the fuels becomes green hydrogen. When such fuels are burned, their carbon element will be returned to the atmosphere. Moreover, the use of green hydrogen, as opposed to the so-called blue hydrogen derived from the steam reformation of methane, will mean that no emissions of carbon dioxide will come from this source. To manufacture aviation fuels derived from the direct air capture of carbon and from hydrogen generated by electrolysis will require a huge input of energy. Sufficient energy would be available only if we were able to depend on nuclear reactors to provide it. Such synthetic fuels will be costly to produce; unless they are subsidised, they will be unable to compete with petroleum-based fuels or fuels derived from biological feedstocks. However, biofuels have a high opportunity cost, since the production of their feedstock is liable to pre-empt the use of valuable agricultural land. They are therefore best avoided.

We need to support the development of carbon-neutral synthetic aviation fuels. I propose therefore that, in the first instance, they should be allowed to incorporate green hydrogen as well as carbon not derived from direct air capture but captured from fossil-fuel emissions. In time, both these allowances would be abolished.

[Baroness Jones of Moulsecoomb (GP)]

I have always been very sceptical about carbon capture and storage and direct capture of carbon dioxide from the air, because they are basically unproven technologies. I could say that I am even quite sneery about them, because people constantly use them as justification for not adopting the tried-and-tested solutions of energy reduction, energy efficiency and renewable energy. We are often distracted by shiny technofixes, which give an excuse not to make the tested and sustained reductions in carbon emissions that have to take place. As far as I am concerned, the best carbon capture and storage is coal—we should just leave it in the ground.

That said, I am quite swayed by the argument of the noble Baroness, Lady Liddell, about future-proofing. That is very valid and I am very pragmatic in saying that we need to pursue all solutions to the climate emergency. If carbon capture works and can compete on cost with other carbon reduction measures without creating additional harm or risks, it should absolutely be eligible to compete for revenue support contracts. Of course, it could also help my clean air Bill, which tries to emphasise not polluting the air in the first place. Failing that, if we want clean air—which is incredibly important for all of us and a human right, according to the UN—we have to take every opportunity we can to clean it up.