Sustainable Energy Generation: Burning Trees

Barry Gardiner Excerpts

Tuesday 6th December 2022 Westminster Hall

[Barry Gardiner (Brent North) (Lab)]

It is a pleasure to join in the debate, and I pay tribute to the hon. Member for North Devon (Selaine Saxby) for introducing it. I feel for her: about a decade ago I was in exactly the same position as a Back Bencher trying to tell my Front Bench team that they were mistaken in going down the biomass road. I think the Government are at the point where they will listen; indeed, I hope that is the case because, if they do not, it will make a mockery of all that we are doing on not only climate change but biodiversity.

I say that in the week that COP15—the Convention on Biological Diversity—is due to meet in Montreal. That is significant because the Drax power station is consuming whole trees from primary forests in British Columbia, in Canada. The Canadian Government should look at that carefully because we are talking not just about the case—ably made by the hon. Member for North Devon and my hon. Friend the Member for Warrington North (Charlotte Nichols)—for looking at what this practice is doing to increase emissions and at whether it can be sustainable in terms of the lifecycle of the trees, but about what it is doing to the wider environment and biodiversity. That is what is so terrifying.

The hon. Member for North Devon was right to speak about our inability to keep on using land in this way to feed a power station such as Drax. She spoke of an area 1.5 times the size of Wales; the figure I have is three times the size of Wales. Whatever it is, it is clear that this biomass cannot be sourced domestically, if this is to go on. More than that, it cannot be utilised because of the water resource required to produce the pellets for Drax.

The Department has been asked what the natural absorption rate of the emitted carbon would be if we replenish those lost resources—that is, if we replace those trees to absorb the emitted carbon. It gave an answer—it was, “We do not hold this information.” Well, other people have calculated it, and it is 190 years. We have seven years left until 2030, when the whole world must be on a declining pathway of emissions, and 27 years until 2050, when we have to achieve net zero. So the timescale—even accepting the principle that this is only about carbon emissions and that this is a cycle—is just too long.

The Government will no doubt talk about how CCS can be married up with BECCS. They will say that if we can capture those carbon emissions, that will make it all right. However, only 44% of emissions released at the Boundary Dam project in Canada were captured. The Government have not been prepared to say that they would hold Drax to what Ember, at least, has said should be the target—95% of emissions captured.

I want to focus on some of the key lies being told by Drax. I say that advisedly, because I have been to Drax and debated many times with its scientists. Over the years, I have tried to listen carefully to what they have said, and I have given them the benefit of the doubt on occasions. We need to transition away from biomass; I do not think we can simply stop it, and I am not saying that the contract should immediately be cut, but it is certainly not right for the Government to provide the £31 billion of additional subsidies entailed by what is now proposed over the lifetime of the project.

Drax says that its responsible sourcing policy means that it avoids damage or disturbance to primary and old-growth forest. That is not true, and the “Panorama” programme ably exposed the fact that it is not true. Drax said that many of the trees it had cut down had died and that logging would reduce the risk of wildfires, which shows just how little it knows about biodiversity, because many forests, particularly on the western seaboard of North America, require fire as a stimulant to the germination process. However, the fire spreads quickly; it does not kill the tree, but it does bring about new growth.

The trees on the entire area covered by the second Drax logging licence have now been cut down. It is simply not the case, as the company said, that the forests have been transferred to other logging licences. It said it does not hold those licences anymore. Again, that was a lie. “Panorama” checked that claim by going to the Government of British Colombia, who confirmed that Drax does still hold those licences. I understand how things progress, and I have no doubt that the company was set up to try to do good. We all thought at that stage that this was really going to be a sustainable way of tackling climate change, but Drax has got further and further into a reality that is now simply leading it to lie to the public. It is time that the Government distanced themselves from that lie.

The company says it uses some logs to make wood pellets, but it claims that it uses only ones that are small, twisted or rotten. I do not know whether Members have ever seen the process of gathering and taking logs from a forest. The idea that somebody is checking whether they are small, twisted or rotten and that only those are taken back to the power station is complete nonsense. However, when the logs get there, they can be sorted, and surveys at the pelletisation destinations show that only 11% of logs delivered to plants in the last year were classified as twisted, rotten or of the lowest quality, and could be used.

I am sorry the Government are now considering a further proposal from Drax. I really hope—not only for climate change purposes, but because of the wider biodiversity impact—that they will think very long and very hard, take notice of what the hon. Member for North Devon and my hon. Friend the Member for Warrington North have said today, and just say no. We have to transition away from burning trees. It is a damaging way of using forests, and it cannot be sustained.

[James Gray (in the Chair)]

We have 30 minutes until the winding-up speeches and there are six Back-Bench speakers, so taking five minutes each would be a courtesy to each other.

--- Later in debate ---

[Dr Alan Whitehead (Southampton, Test) (Lab)]

I have listened very carefully to the debate and I congratulate the hon. Member for North Devon (Selaine Saxby) on securing it.

Overall, we have had a thoughtful debate about the difficult issues facing UK energy production, including what sources it is right or wrong to use, subsidies that might be put in place, and arrangements for the production of comparatively low-carbon energy that could provide power more cheaply and efficiently, as well as, most importantly, on a lower carbon basis.

As the hon. Member for Mid Derbyshire (Mrs Latham) mentioned, undoubtedly a while ago biomass was thought to be a simple proposition for power production that was fine in terms of the overall carbon cycle: it uses trees that grow again, thus balancing the CO₂ put into the atmosphere through burning. Actually, the same is true of gas power, for example, only carbon has been sequestered in the ground over many millions of years and now we are putting it back into the atmosphere. It is all about cycles and the carbon replacement period, which is an important initial point to consider. The debate has moved on considerably, because people are thinking carefully about what those cycles mean for carbon replacement.

We need to question if it is ever right to use thermal means to produce power. We currently have 200 biomass generators in the UK, producing 88% of UK power. In addition, whether or not we regard burning wood waste and other materials for power as unacceptable, we have 54 energy and waste plants across the country that produce some power, half of which produce a lot of heat that can be used for district heating purposes. They ought to come into the carbon balance equation that we are trying to achieve.

We have heard today an incontrovertible point: taking whole trees, burning them for power and transporting the product of those trees across large parts of the world is clearly not the best use for them. That is particularly the case if those whole trees have not been grown in farmed or managed forests but in primeval ones, where they have captured carbon for many centuries, and are being clear felled and used to fill a hole in energy production.

[Barry Gardiner]

Would my hon. Friend also accept the distinction that a managed forest for production timber and biomass has nowhere near the biodiversity that there is in the primary forests that we have been talking about? It is a matter that we cannot look at simply in terms of carbon emissions; we have to look at it in terms of wider sustainability and the biodiversity of species.

[Dr Whitehead]

Yes, indeed, we need to take careful account of the points my hon. Friend has made about wider biodiversity issues. However, we have sources of material—starting with the idea of managed forests, under certain circumstances, or energy crops, under other circumstances—that are much shorter in their use and carbon sequestration, such as miscanthus and short-rotation coppicing of willow. Those can be produced with a very short time of burning and resequestration. However, as my hon. Friend has said, there may be other environmental consequences attached to the practice.

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[Selaine Saxby]

rose—

[Barry Gardiner]

rose—

[Graham Stuart]

I will make a little more progress, if I may.

It is important to remember that wood used for bioenergy is not high-quality and high-value timber. Although it has been said repeatedly in the debate that wood used for bioenergy diverts material away from other uses, the opposite is true. In response to my hon. Friend the Member for St Ives (Derek Thomas), who comes from the construction industry, the value of timber for other uses is much higher than the value of timber used for waste, so there is no economic rationale for using it.

Wood pellets and Drax purchases do not compete, because they do not offer the same financial return. The idea—it has obviously been seeded, taken root and taken off, because I hear it again and again—that people are, in a sinister way, diverting excellent wood from uses for which they would get paid a lot more money to a use for which they get paid a lot less has spread, and it has become a conspiracy. In fact, bioenergy use does the opposite: it supports sustainable forestry. It supports the very forests that can supply wood panelling and construction material. We can ensure that it is part and parcel of delivering a stronger forestry industry around the world, and that we can have more wooden-constructed homes, as my hon. Friend the Member for St Ives suggested we should have.

[Barry Gardiner]

I am sorry to interrupt the Minister in his rhetorical flow, but does he accept that two of the licences that Drax has utilised in British Colombia were for areas of primary forest that have been destroyed? Those areas—in one case, more than one square mile of primary forest—have been clear-felled, and Drax has denied it.

[Graham Stuart]

I will write to the hon. Gentleman on that specific issue, as it is right that I give him a proper answer. On investigation, we do not find that the allegations that “Panorama” made are fundamentally sustained. The general process involves thinnings. Every managed forest has to be thinned in order to be sustainably managed, and thinnings sometimes include whole trees—that is the nature of forest management. If we do not do it, it does not have the desired effect. It is worth saying again to my hon. Friend the Member for North Devon that young, vigorous stands grow and sequester carbon at maximum speed. As stands get older, the tree canopy closes and individual trees begin to die off from self-thinning and other causes. Very old forest stands can reach a carbon-neutral equilibrium, whereby trees die and decay at approximately the same rate as they grow back.

It is worth saying that before thinnings were used for bioenergy and turned into pellets, they were typically burned to get rid of them. The idea that the use of biomass is taking away fundamental primary forest, which is being cut down even though there are better uses for it, is false, but I will write to the hon. Member for Brent North (Barry Gardiner) about the specifics of that. It is always possible that there are exceptions, but Canada and the United States have really strong forest management and sustainability practices, regulations and laws. We have looked closely at the issue, and if they wish to keep this business going and manage the crops of these forests, they have every incentive to maintain them.

I say to my hon. Friend the Member for North Devon that we could do with bringing in some experts, and I will hold a meeting. Let us have the scientists in and discuss some of this stuff—it would be an opportunity to talk about it further.

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[Graham Stuart]

I entirely agree with my hon. Friend. We must not get stuck in the past, and we need to have a thorough and proper examination of the issues. That is why, as one small contribution to that, bringing in the Government experts and the people we are listening to would be a useful way to carry on with this and make sure that we are making the right judgments overall. The last thing we want to do is get this wrong. As successive Members have said, there is a substantial subsidy involved for a start, and we want to ensure that whatever we are doing is the most sustainable, both economically and environmentally, for the good of the country. It is well worth having that conversation.

Forest sites are harvested to produce fibre for multiple products, such as timber, plywood and oriented strand board, among others. Those industries invariably pay more for the fibre. Wood pellets for bioenergy make up only a small portion of a harvest—notwithstanding the talk of 27 million trees—and help to maximise the benefit of each harvest. It is, effectively, a harvest—an energy crop, and a by-product energy crop of the main product, which is timber produced for other uses.

Material that is not wanted by sawmills can be used when it does not have a suitable destination in the sourcing regions—for example, when there is a lack of local pulp and paper mills or other suitable industries. The destination of lower-quality material such as low-grade roundwood that is unsuitable for use in sawmills depends on the types of industry present around the sourcing area. If there is a pulp or paper mill nearby or a wood panel producer, material suitable for use in those industries is taken there, as those end users pay more for the fibre than wood pellet producers do. It is simply not economical for the harvester to sell those materials to the pellet mill if other, higher-paying industries are present.

[Barry Gardiner]

rose—

[Graham Stuart]

I give way, for the last time, I think.

[Barry Gardiner]

The Minister has been generous in giving way, and I appreciate that. Will he address an issue that many Members have raised, which is the payback period and the cycles not being short enough to achieve the emissions reductions in the timeframe that the climate will allow?

[Graham Stuart]

The hon. Gentleman, as so often, has put his finger on the central point. We cannot do this by looking at an individual tree. We look at the whole forest and different parts of it, which are of different ages. That forest is harvested in an ordered way. We need to look at the whole forest, and as long as there is replanting—that is precisely what the sustainability criteria are about, and those are applied in Canada, America and elsewhere—and the overall carbon sequestration is maintained, and indeed over time preferably increased, there are no emissions, effectively.

Let me return to the point source emissions at Drax and say that that is why we do not count them. As long as the overall picture is in balance—this is only a by-product of the energy crop and of the main use, which is for timber—we can see, straightforwardly, that it is right not to view that as having emissions. That is what the policies are in place to try to ensure.

I must allow two minutes for my hon. Friend the Member for North Devon, and I look forward to a further discussion of the matter. As has been said, I have been in the job for only a relatively short time, and, as Members can tell, I am seized of a certain view, but I am certainly interested—