We live in the critical decade for climate change. The world increasingly experiences the damages and losses from extreme weather events caused by human-made climate change. Crop losses, devastating floods, catastrophic wildfires and rising sea levels cannot be ignored. If we do not achieve a balance between our greenhouse gas emissions and removals from the air, these impacts will become considerably worse and more dangerous. The UK has legally committed to achieving a net zero greenhouse gas balance by 2050. However, it is currently hotly debated how this goal can be achieved. The Land Use for Net Zero (LUNZ) Hub brings together researchers, policy-makers, industry leaders, innovators and rural community representatives from all four nations of the UK. Our 33 member organisations include researchers and practitioners from green finance, agricultural advisory organisations, NGOs, and an arts collective. The goal of the LUNZ hub is to accelerate positive land use change that reduces harmful greenhouse gas emissions, increases food security and restores a healthy environment for plants, animals and people. The Hub will equip UK policy-makers, industry and stakeholders with the advice they need, in the format and timeframe they require, to take policy decisions to help avert dangerous climate change and lead to a better future. We will bring together scientific evidence and stakeholder perspectives to define shared, net zero scenarios (plausible alternative futures)and credible pathways (steps including policies and incentives) to achieve them by 2050. The Hub will establish an Agile Policy Centre, a Net Zero Futures Platform, and a Creative Methods Lab. Within the Hub, our four National Teams will work together with our Topic Expert Groups to build capacity for a Just Transition to net zero that benefits people and planet alike. The Hub will support the UK Government and the devolved administrations in achieving multiple environmental goals by understanding the impacts of policy decisions on all relevant aspects, including renewable energy, agriculture, planning frameworks, afforestation, water management, nature conservation, biodiversity, and rural economies. The Hub will work on several priority policy areas: 1. Land use change that benefits the environment and is socially just, leading to ecosystem co-benefits such as biodiversity, soil health, human health and wellbeing, and green growth at national, regional and local levels; 2. Future agricultural, environmental and food policies that deliver a net zero future, building on the Agriculture Act 2020, Environment Act 2021, Agriculture Bill 2022 (Wales) and 2023 (Scotland), including future sources of finance, payment schemes and measures to reduce greenhouse gas emissions and increase removals while strengthening food security, biodiversity and land-based businesses (e.g. farms, crofts, forestry); 3. Integrating policy with carbon and natural capital markets, to ensure that the drivers and mechanisms for on-the-ground transformation work together for optimal outcomes. Achieving net zero by 2050 will require new technologies and practices which lower greenhouse gas emissions. These will include soil improvement practices, peatland protection and restoration, removal of greenhouse gases from the air and decarbonising our economy, large-scale tree-planting to take up carbon from the air, creation and restoration of habitats, transitioning to a circular economy, and significantly reduce food waste and consumption of higher emitting foodstuffs. To cover these diverse areas the Hub is comprised of the primary players in the UKRI AgriFood for Net Zero Network+, Landscape Decisions Programme, and principal investigators from Greenhouse Gas Removals, Changing the Environment, Digital Environment, AI for Net Zero, and Treescapes Programmes. This team have the experience and expertise to bring together a single voice of authority for Net Zero transformation in the UK.

Nature-based solutions (NbS*) are responses to societal challenges that involve working with nature to deliver benefits for both people and biodiversity. They include protecting existing ecosystems, restoring degraded ecosystems and managing working lands more sustainably. NbS are of national strategic importance in supporting the UK's net zero climate targets and the Government's ambition to improve the environment within a generation. They have gained international significance too: 131 countries include NbS in their UNFCCC climate change pledges. If well designed and robustly implemented, NbS will deliver multiple benefits for climate change mitigation and adaptation, enhance biodiversity, promote human wellbeing and support economic recovery. The challenge is that the implementation of NbS is often piecemeal, narrow in focus, and undermined by weak research/policy/practice connections. UCam-Regen will redress this problem by applying its breadth of expertise in a practically driven analysis that provides the knowledge and tools needed to address several challenges facing the delivery of NbS: NbS can contribute significantly to achieving net zero emissions, although the extent of that contribution is limited by the finite amount of land available and critically by the effects of climate change on ecosystems. NbS are not an alternative to decarbonising the economy and must be accompanied by swift, deep emissions cuts; they must be designed with and for local communities; and they must deliver measurable benefits for biodiversity and be designed to be resilient to climate change i.e. a 'whole systems approach' must be applied - as in UCam-Regen - that integrates economies, societies, and nature. Scaling up, restoration and protection of key ecosystems across UK landscapes requires (a) better protection of natural habitats in the planning system; (b) reforming agriculture and forestry subsidies to better support actions that benefit both climate regulation and biodiversity; (c) connecting habitats across landscapes, building on the emerging Nature Recovery Networks; (d) making it compulsory to build an NbS framework into all new developments, and (e) making space on land for natural systems to adapt to climate change. There is a need to develop robust metrics to assess the effectiveness of a wide range of NbS for carbon sequestration, water regulation, biodiversity and human wellbeing. Well-designed new financing mechanisms, including tax incentives and public subsidies for ecosystem stewardship that meet the NbS guidelines and support climate change mitigation, climate change adaptation and biodiversity, could be instrumental for upscaling NbS and improving social-ecological resilience to climate change, both in the UK and globally. UCam-Regen addresses these challenges by applying a whole systems approach to deliver knowledge and tools necessary to regenerate UK landscapes using NbS approaches. At the heart of the proposal is a recognition that local communities must be engaged with decisions regarding their landscape's future and co-produce solutions, informed by scientific assessments of the optimal landscape management approaches to maximise the delivery of ecosystem services. *We take policy recommendation and definitions from a COP26 Universities Network Briefing led by Prof Coomes https://www.gla.ac.uk/media/Media_790171_smxx.pdf