Can’t See The Woods For The Trees
If my internet connection is working then I listen, most days, to Radio 4. I start at 5:45am with Farming Today and then stream through until the shipping forecast. So when I awoke on the 7th December I was surprised to hear the program open with fears that England was suffering from deforestation.
The Deforestation of England
The Woodland Trust, and Confor, the confederation of forest industries, a UK trade organisation, argued that England, which has just “10% forest cover compared to the 38% average for Europe,” is suffering from deforestation. The government, which is committed to planting 11 million trees over the next forty five years, planted only 700 ha of the 5000ha needed to meet that target in 2015. The Woodland Trust, who are themselves planning on planting 64 million trees over the next ten years, argue more needs to be done to protect ancient woodland and hedgerows “which are being lost to roads, quarries and housing”. There is currently no national logging of this loss with the trust relying on a network of volunteers to spot negative impacts at the local planning level. The trust argues that these woodlands and hedgerows need to be buffered, extended and connected to other woodland through gaping and hedgerow maintenance if the government is to meet it’s own targets.
Protecting Forests Through Global Supply Chains
AS I am in Morocco and it is just a bus and a train ride down from the mountains, so not a big load onto my carbon footprint, I made a brief visit to the COP22 in Marrakesh last month. I went primarily to attend the climate law and governance day but I also attended the launch of TRASE ( Transparency for Sustainable Economies) a new online open-access tool that uses publicly available data to unravel supply chains and reveal the origin of commodities such as soybean, beef, palm oil and timber.
One of the ten most important agricultural crops soybean production reached 336 million tons in 2015 making it the 7th most important crop globally. The USA, the largest single producer, was responsible for 118 million tons (35%) whilst South America (Brazil, 102 million tons, Argentina, 57 million tons and Paraguay, 10 million) was responsible for 169 million tons (50%) of global soybean production. With Canada’s contribution (2%) the America’s are responsible for 87% of the Worlds soybean production; much of it however on deforested land. The TRASE platform addresses this through the “use of trade and customs data to identify the producers, traders and transporters involved in the flow of globally-traded commodities” to bring transparency to the global supply chain so that business can identify commodities originating from deforested land.
The situation is mirrored in Indonesian where deforestation for palm oil production has put the orangutan on the critically endangered list. The clearing, draining and setting alight to the peat of the Indonesian swamp forests in preparation for palm oil plantations in 2015 further led to 100,000 deaths across Asia from the thick belching smoke. Releasing over a billion tons of CO2 in the process and pushing Indonesia into 4th place behind the USA, China and India as the Worlds leading greenhouse gas emitter. [Costing the Earth]
The Starling project, a collaborative venture between The Forest Trust, Airbus, and SarVision uses “high-resolution optical satellite and radar imagery to monitor forest cover in real time” and provide the tools “to enable companies to provide evidence of how they are implementing their No Deforestation Commitments.” As with TRASE the Starling project seeks to provide transparency in global supply chains; supply chains in which just four products, beef, palm oil, timber and soybean are responsible for two thirds of global deforestation . In addition to habitat and species loss the deforestation undertaken to grow these crops is responsible for over 10% of global greenhouse gas emissions.
Another major deforestation crop is Cocoa, produced by just six million smallholders worldwide it is a global crop controlled by less than a dozen companies. In West Africa, the source of 68% of the Worlds chocolate and home to four million cocoa farmers, cocoa is the principal cause of deforestation.
Logging and Land Tenure
Subsistence farmers are blamed for much of the remaining deforestation and whilst they undeniably contribute, in a recent report from the Congo researchers identified logging and land tenure rather than farming as the principle cause of deforestation. Tropical forests are the most diverse ecosystems on planet Earth, they store and clean water, influence the climate and act as large reservoirs for carbon that has accumulated over the lifetime of the forest. When the forest is removed that diversity is lost, the ground dries up and the carbon stored in the forest and it’s soils is released. Over 65% of tropical deforestation and 7% of global carbon emissions now result from the cultivation of less than a dozen crops.
A Carbon Neutral Future From Forests?
Old Forests, be they ancient English woodland, Indonesian swamp forests, or Amazonian rain forest are all bigger carbon sinks than what can be captured in new plantations. It’s likely that for every hectare of old forest felled two hectares or more of new forest are needed to offset the carbon released. New forests that similarly don’t have the diversity or provide the habitat of the ones lost.
In a recent Inside Science program it was claimed that to reach a negative carbon balance; where carbon captured as biomass is used to fuel an energy plant, and the CO2 produced is then captured and stored; would require an area of land 1-2 times the size of India (3-6 million km2) to grow the biomass. The idea is somewhat over complicated and risks turning captured carbon into the climate equivalent of nuclear waste as we struggle to store billions of tons of CO2. If instead that energy was produced by other carbon neutral sources (i.e. solar, wind and water) and the biomass grown as both the carbon capturing and carbon storing device, we would not require a network of silo’s storing ‘dry ice’ or it’s equivalent, but the World would still need to plant a forest the size of India to capture and store the carbon the 20th century has released.
Restoration and Regeneration
Whilst stopping deforestation completely would be the best course of action, restoring recently deforested land would result in capturing more carbon than planting a new forest on agricultural or marginal land. The Amazon has lost 20 %, one million km2, over the last 40 years and whilst it is unlikely that all that loss can be recovered, with strategic planting perhaps 20% of what has been lost could be recaptured. If the same strategy could be applied to West Africa, the Congo and Indonesia; perhaps as much as ½ million km2 of tropical forest could be restored within 50 years. It is though just 10% of what is needed. If Europe were to similarly increase it’s forest cover by 10% then that rises to 20% of what is needed but again will take 50 years to reach fruition.
The UK has 450,000km of hedgerow but ,as a consequence of the plough up policy of 1948, has lost 121,000km. Gap filling the existing and reducing field sizes to recreate the hedgerows lost could increase the UK’s wood cover by as much as 5%; more than meeting the UK governments target of 2% over the next forty five years.
Whilst deforestation and afforestation are the key issues in Africa, South America and Asia, hedgerow planting could similarly contribute the equivalent of a billion km2 or more of new forests in agricultural regions of the tropics. In many instances planting could encourage diversification with trees and shrubs for the production of fruit and nuts, oilseed for bio-fuel production, biomass for energy or trees for soil remediation and erosion prevention. Such diversification provides commercial value and resilience as well as contributing to climate mitigation.
Whilst projects such as TRASE and Starling are providing the tools for businesses to identify commodities originating from deforested land or to verify no deforestation commitments, there needs to be additional tools to further monitor and measure restoration and afforestation strategies. If deforestation was to end tomorrow, the World would sill need to create 5 million km2 of new forest and woodland if it is to meet its commitment to prevent global temperatures rising above the 2 degrees C threshold agreed in Paris. It is not enough just to arrest the damage, we must repair it too.
However there are no supply chains, no customs or logistics data to mine to see if a forest or a hedgerow has been replanted or is being maintained. Satellite data, a resource the Starling project has utilized to reveal changes in forest canopy in palm oil production could similarly be utilized to monitor afforestation efforts. An approach that applies as much to reafforestation strategies in the UK as it does to the tropics. However monitoring is only half the story and whilst carbon sequestration and habitat creation are important global functions of trees they are not their sole function. Trees are a commodity, we need the wood but they also perform other crucial functions within the local environment, be it improving flood defences, arresting soil erosion, removing air and noise pollution or just providing beauty and enjoyment; trees are an integral part of the human landscape.
Human Beings and Climate Mitigation Strategies
The first principle of the Rio Declaration was that “human beings are at the centre of concerns for sustainability”. [Earth Summit I, 1992 ]. Keeping human beings at that centre should similarly be the first principal of all future environmental and climate mitigation strategies. The people whose lifestyles need to change need to be involved in that change; for whilst human beings are at the centre, they are also the cause, our environmental and climate crisis is a problem of our our making and it is within our own humanity that the solutions similarly lie.
The world has similarly changed considerable since 1992, there was no remote sensing, the internet had not yet gone ‘viral’ and Glastonbury would have been regarded as the centre of the Gig economy. However somethings have not changed; we have continued to lose habitats at an alarming rate and have bought more species to the brink of extinction over the last twenty four years than since the demise of the dinosaurs. If we continue on this trend for another twenty four years there may well be nothing left to save.
The Satellite’s Eye: Remote Sensing
The Forestry Commission’s Corporate plan for England identified it’s priorities for English Woodland as to “protect, improve and expand”. Seeking to “bring two thirds of all woodland under management by 2018” and to create a total of 2600km2 of new woodland by 2060. The plan further commits to provide “support for mechanisms and payments for ecosystem services” and calls for “more trees and woodlands in and around towns and cities.”
In order to meet those targets the commission needs to know the real time state of Woodland across England. As only 57% of England’s woodland is currently sustainably managed and the commission has prioritised bringing only 2/3rd’s under management by 2018, a significant proportion of Woodland will remain without any mechanism to assess threats to it for the foreseeable future. Unprotected it is, as the Woodland Trust identified, “at threat of being lost to roads, quarries and housing” as well as to the disease and climate threats the Forestry Commission prioritise in their plan. With no mechanism in place to record these losses the trust has resorted to relying on a network of volunteers to spot negative impacts at the local planning level. However with the advent of satellite imagery and the internet the ability to log and record existing woodland remotely and to similarly record any impending changes to it now exists.
All land use management strategies, at both the planning and monitoring stages rely on maps. Maps that can be greatly enhanced with the use of satellite imagery. In some instances, as with the Starling project those images are used to identify deforestation and species changes in tropical forests; it is a specific task that can and is performed by machine learning, but in many others, particularly mapping trees in complex environments such as cities and towns, the process still requires human intervention.
Crowd Sourcing The Map: A Place To Plant Your Tree
AfSIS (African Soil Information Service) and their partner QED have been using satellite imagery to map land use in Africa for the last year. The process relies on volunteers, ‘citizen scientists’ to annotate images to identify buildings, cultivated land and forestry in a 250m2 grid. The same method could be used for England, if not the whole of the UK, to map the current state of woodland and land use in general [Mapping UK Habitats] Done correctly such a map could not only identify existing woodland by when interpolated with other data such as soil maps, hydrological or species distribution could identify where the benefits of planting new woodland and restoration of existing woodland can be best realized. The same map could also be used to monitor the health and, with weather maps, predict the movements of threats to woodland from pests or diseases.
A single map into which all environmental data can be interpolated so as to give a complete and accurate reflection of the state of the environment at any scale and to any stakeholder who needs it. [DFM]
Such a map would be the means to calculate the quantitative and qualitative benefits and cost of a given action to the environment. To build such a map at a working resolution requires a large network of volunteers, the same network that will later be required to monitor and update the map. It may be possible to develop machine learning but in the interim, and to give the machines something to learn from, the map requires human input. That input similarly performs another crucial function; it engages the very people it needs to change.
Citizen scientists have and continue to contribute to many existing mapping projects but in reality relying on volunteers to create and maintain critical environmental maps in order to meet our climate objectives is perhaps a policy that is as likely to succeed as relying on governments to voluntarily abide to environmental agreements. It is doomed to failure for there are not enough volunteers to provide the level of coverage needed to map and then monitor global land use and climate mitigation strategies to the extent required to achieve COP22 objectives.
The Gig Economy: A Tree Hugger’s Paradise?
Paying stakeholders to both maintain and monitor climate mitigation strategies is likely the only viable way of bringing about the level of change and monitoring that is required to meet our climate objectives. If we are to plant a forest the size of India we will need a lot of spades to do so. In this respect the gig economy may well come to the rescue, for we do not have a lot of time in which to raise the number of tree huggers needed to plant all the forests and woodland needed to replace what has been lost. In England an army will be needed to both identify and plant the 13000km2 of land required for the 64 million trees the Woodland trust aim to plant. Five times more ambitious than the Forestry Commission, if successful the Woodland Trust’s plan would double the UK’s woodland cover but it is similarly a plan that will need a radical new approach to be successful.
Carbonizing the Blockchain
The block chain and the concept of smart contracts makes paying a large number of individuals to plant and maintain a framework of new forests possible. It also offers the means, with satellite and drone imagery to make it possible to employ an equally large number of people to analysis and annotate maps to confirm that trees have been planted and carbon is being sequestered. It further offers the potential to automate payments for carbon mitigation efforts. Using smart contracts carbon credits could be earned by farmers and landowners. This could then be verified by employing others to analysis and annotate satellite and drone imagery. Using quantifiable metrics the amount of carbon sequestered could be regularly qualified triggering regular payments depending on the extent and increase in canopy cover. A trickle system that ensures trees and plantations are not only planted but maintained to achieve the environmental and climate objectives. A three point verification system between the farmer, the satellite and the gig economy. Such a mechanism is not limited by scale , an individual planting a single tree in a garden or a landowner planting a 1000 ha stand; each would be paid according to the benefits achieved by their efforts. Nor to just the gig economy for annotating maps is something that could be done by refugees; providing them with both an income and a role in repairing planet Earth. A plan to build such a system was previously proposed to Ethereum and whilst it was well received no developers stepped forward to help build it.
Developing New Technology
Whilst much of the technology already exists, the satellite images, the software to annotate those images and the smart contracts to pay the cartographers and monitors: new apps for phones that allow for newly planted trees to be quickly recorded and uploaded along with the gps co-ordinates need to be created. Satellite imagery could then be used to confirm the work with human verification or machine learning used to measure the canopy cover and the amount of carbon sequestered estimated. This could be performed over the lifetime of the tree or stand and used to adjust and refine payments to ensure carbon mitigation strategies are maintained.
The use of new technologies such as blockchain, machine learning and remote sensing offer real opportunity to make climate mitigation strategies a reality that works at the local and global scale. The World though has a tough hill to climb, not only must it plant a forest the size of India but it must similarly cease from decimating the existing forests. It must also find a solution to our addiction to fossil fuels, as we to our consumerism, as it is these habits that are the root cause of our environmental and climate woes. There is though no such thing as a free lunch or a technological fix for greed; each and everyone of us needs to reduce our own personal carbon footprint, our own personal consumption of fossil fuels and forest products: for this is not only the most effective way but similarly essential if we are to mitigate climate change and arrest deforestation.