Anthropogenic pollution undermines the integrity of Earth ecosystems and severely affects natural resources essential for human life. Keeping our planet clean and our ecosystems healthy will not only contribute to addressing the climate crisis but also help regenerate biodiversity, ensure the sustainability of primary production activities and safeguard the well-being of humankind. In line with the objectives of the European Green Deal, particularly its zero pollution ambition, and the 2030 Climate Target Plan, and other relevant EU legislation^[1], this destination seeks to halt and prevent pollution by focussing the work programme 2021-2022 on fresh and marine waters, soils, air, including from nitrogen and phosphorus emissions, as well as on the environmental performance and sustainability of processes in the bio-based systems. Synergies with other clusters (notably 1 and 5), relevant destinations as well as missions and partnerships will be exploited.

Halting emissions of pollutants to soils and waters is of fundamental significance for the planet. Diffuse emissions of pollutants from land and urban sources, including atmospheric depositions, are a major stress factor for terrestrial and aquatic ecosystems, threatening the quality of surface waters and aquifers, and affecting soil quality and all water-dependent sectors that require a holistic understanding of the pollution sources, key vectors and pathways. Projected impacts of climate change will alter, and notably reduce, the hydrological flows in many parts of Europe, while eutrophication could be exacerbated by increasing temperatures. Climate change and increasing water demand will exert significant pressures on surface and groundwater quality^[2], notably where the combined effect of water table depletion and sea level rise will endanger the integrity of coastal aquifers and groundwater quality. This is due to saline water intrusion or extreme events (e.g. higher tides, storm surges or inland flooding events), which will put coastal wetlands and reservoirs, estuaries and ecosystems at risk. While recognising its essential role in aquatic ecosystems functioning and services, the sediments originating mostly from run-off and erosion are likely the major source of physical pollution of water bodies (excessive turbidity, impacts of deposition, accumulation of litter and debris) and contribute to a large extent to chemical and biological pollution of receiving waters. Beside land use practises, the increasing intensity and variability of precipitation will exacerbate erosion risks, affect the deposition and transport of sediments and could lead to a remobilisation of legacy contaminants and further deteriorate the quality of soils, sediments and water bodies, including aquifers, estuaries and coastal areas, and of their ecosystem function and services.

Keeping nitrogen (N) and phosphorus (P) cycles in balance is another crucial challenge. N and P flows from anthropogenic sources, mostly from excessive or inefficient input of fertilisers (including manure, sewage sludge, etc.) in agriculture, currently exceed planetary boundaries. Their leaching and run-off negatively affect soil biodiversity, pH, organic matter concentration and carbon sequestration capacity, and cause the eutrophication of water bodies while ammonia and nitrous oxide emissions affect air quality and climate. As all environmental media are concerned, a systemic approach is necessary to limit N/P emissions from different sources, for example through the deployment of alternative fertilising products, and considering regional conditions (geography, climate zones, economy activities, soil properties, eco-system condition, agricultural practices, governance structures etc.), and to bring N/P flows back within safe ecological boundaries

Protecting drinking water and managing water pollution in rural settlements, and in increasingly dense urban areas requires innovative and holistic approaches at city/catchment level to ensure water quality, resilient to the impacts of climate and global change, by considering different spatial and temporal scales and contexts, aging water infrastructures, as well as pollution derived from point and non-point sources, and natural/human-made disasters. Protective measures should consider current and future land use, environmental needs and socioeconomic interests as essential elements for improving water quality and its management and governance. Re-emerging pollutants, such as polychlorinated biphenyls (PCB) or mercury, and contaminants of emerging concern (CECs) in water bodies may have impacts on ecological and human health, and some are not well regulated under existing environmental legislation. Sources of these pollutants include e.g. industry, agriculture, urban runoff, household products, coatings, paints and pharmaceuticals that are normally disposed of to sewage treatment plants and subsequently discharged into water bodies. Micro-pollutants, plastics, pathogens and CECs, individually or combined, represent a concern for a safe and good quality drinking water supply. Increasing water temperatures, notably due to climate change could deteriorate the quality of aquatic ecosystems and drinking water sources by favouring the conditions for enhanced eutrophication as well as pathogen development or the spread of invasive species. Emerging concerns are also growing at the level of drinking water treatment and distribution, notably in relation with disinfection operations and possible harmful effects of by-products and metabolites.

Addressing pollution on seas and ocean is a prerequisite for a healthy planet. The ocean is being polluted and destroyed due to the release of substances or energy in marine waters which initiate a range of subsequent effects. According to a new European Environment Agency report, all four regional seas in Europe have a large-scale contamination problem, ranging from 96% of the assessed area in the Baltic Sea and 91% in the Black Sea, to 87% in the Mediterranean and 75% in the North-East Atlantic Ocean. The main sources of pollution include industrial, agricultural and municipal waste runoff, other human activities (e.g. transport), underwater noise, light, atmospheric deposition, etc. into marine waters.

Increasing the environmental performance and sustainability of processes and products plays a significant role in keeping our planet clean. Environmental pollution resulting from human activity is detrimental to ecosystems at different functional levels, representing, also, an important economic burden for society. Circular bio-based systems, including biotechnology, have the potential to substantially contribute to the European Green Deal objectives, provided that they are developed sustainably and systemically aiming at mitigating the climate change and its impacts, increasing resource efficiency and circularity, preserving and restoring ecosystems services, natural resources, air/water/soil quality and biodiversity. Indicators of such sustainability are needed, building on dynamic perspectives at scales ranging, in space, from planetary to local ecosystems and, in time, from next decade to the end of century and beyond. Environmental impacts should be traced along value chains and trades to enable responsible production and consumption.

Expected impacts

Pollution must be halted and eliminated to guarantee clean and healthy soils, air, fresh and marine water for all. To reach this objective, it will be paramount to advance the knowledge of pollution sources and pathways to enable preventive measures, improve monitoring and control, apply planetary boundaries in practice and introduce effective remediation methods.

Proposals for topics under this destination should set out a credible pathway to contribute to the aforementioned goal to achieve a clean environment and zero pollution, and more specifically to one or several of the following impacts:

• Advanced understanding of diffuse and point sources of water pollution in a global and climate change context, enabling novel solutions to protect water bodies, aquatic ecosystems and soil functionality, and further enhancing water quality and its management for safe human and ecological use, while fostering the EU’s and Associated Countries’ position and role in the global water scene.
• Balanced N/P flows well within safe ecological boundaries at EU and Associated Countries, regional and local scale, contribute to restoring ecosystems.
• Clean, unpolluted seas in the EU and Associated Countries as a result of successful behavioural, social-economic, demographic, governance and green-blue transitions.
• Circular bio-based systems reversing climate change, restoring biodiversity and protecting air, water and soil quality along supply chain of biological feedstock and industrial value chains, within the EU and Associated Countries and across borders.
• Innovative biotechnology creating zero-pollution bio-based solutions.

When considering their impact, proposals also need to assess their compliance with the “Do No Significant Harm” principle^[3] according to which the research and innovation activities of the project should not be supporting or carrying out activities that make a significant harm to any of the six environmental objectives of the EU Taxonomy Regulation.

Actions should develop scientifically robust and transparent approaches and methodologies, building on achievements from previous research activities, where possible and appropriate. To ensure deployment, trustworthiness, swift and wide adoption by user communities, and to support EU and national policy-makers, they should adopt high standards of transparency and openness, going beyond ex-post documentation of results and extending to aspects such as assumptions, models and data quality during the life of projects.

Topics under this destination will address the following impact areas of the Horizon Europe strategic plan for 2021-2024: “Climate change mitigation and adaptation”; “Enhancing ecosystems and biodiversity on land and in waters”; “Good health and high-quality accessible healthcare”; “Clean and healthy air, water and soil”; “A resilient EU prepared for emerging threats”; and “Inclusive growth and new job opportunities”.

[1] cf. European Green Deal deliverables farm to fork strategy, biodiversity strategy, soil strategy, but also bioeconomy strategy, marine strategy, the 2030 Agenda for Sustainable Development etc., the Missions on Soil Health and Food as well as on Ocean, seas and waters, etc.

[2] Member States identified that diffuse pollution is still a significant pressure that affects 35 % of the area of groundwater bodies, while quality standards (pesticides, herbicides…) were exceeded in 15 % of the groundwater bodies

[3] as per Article 17 of Regulation (EU) No 2020/852 on the establishment of a framework to facilitate sustainable investment (EU Taxonomy Regulation)

Online Manual is your guide on the procedures from proposal submission to managing your grant.

Horizon Europe Programme Guide contains the detailed guidance to the structure, budget and political priorities of Horizon Europe.

Funding & Tenders Portal FAQ – find the answers to most frequently asked questions on submission of proposals, evaluation and grant management.

Research Enquiry Service – ask questions about any aspect of European research in general and the EU Research Framework Programmes in particular.

Enterprise Europe Network – contact your EEN national contact for advice to businesses with special focus on SMEs. The support includes guidance on the EU research funding.

IT Helpdesk – contact the Funding & Tenders Portal IT helpdesk for questions such as forgotten passwords, access rights and roles, technical aspects of submission of proposals, etc.

European IPR Helpdesk assists you on intellectual property issues.

CEN-CENELEC Research Helpdesk and ETSI Research Helpdesk –  the European Standards Organisations advise you how to tackle standardisation in your project proposal.  

The European Charter for Researchers and the Code of Conduct for their recruitment– consult the general principles and requirements specifying the roles, responsibilities and entitlements of researchers, employers and funders of researchers.

Partner Search Services help you find a partner organisation for your proposal.