Circular economy interventions in four key sectors can halt global biodiversity loss and help the world's biodiversity recover, finds this study.

Tackling root causes - Halting biodiversity loss through the circular economy, written by experts from Sitra and Vivid Economics, is the first to quantify the role a circular economy can play in tackling global biodiversity loss, targeting the four sectors with the largest impacts:

• food and agriculture
• construction
• textiles
• forest and forestry

Circular interventions in these sectors can halt biodiversity loss even if no other action is taken. And more than that, the study finds that the world’s biodiversity can recover to 2000 levels by 2035, if the circular interventions are implemented.

Longstanding research on wood cascading has identified a variety of factors to enable more efficient, circular use of forest-based products in Europe.

This paper finds that two of the most critical barriers to wood cascading are:

• Competition between energy and material uses of waste wood in policy, market and infrastructure
• Inadequate information on and low quality of waste wood, including pollutant content.

It makes the following recommendations for policies and business:

• Redesign production processes to deal with contamination and increase quality
• Coordinate energy and waste policies
• Advance reporting standards about material composition of bioproducts
• Explore the best forms of involvement, awareness raising, communication and policies.

Urban agriculture comes with its own share of environmental impacts. Circular strategies promise to reduce these impacts, but not all strategies are resource efficient and environmentally effective.

This paper finds that the most eco-friendly and circular strategies for urban agriculture, taking a Mediterranean tomato crop as a case study, include:

• Struvite (phosphate mineral recovered from wastewater treatment) instead of non-renewable phosphate fertiliser to conserve freshwater
• Recycled steel and materials for urban agricultural infrastructure to reduce carbon emissions, toxicity and freshwater pollution
• Closed-loop irrigation to minimise ocean and freshwater pollution. However, if new infrastructure is required, it could lead to an increase in carbon emissions.

Policies are focusing on halving food waste to help conserve increasingly strained food resources. However, expanding their scope of action to include dietary changes and complement targets with resource footprints has greater potential to save resources while avoiding trade-offs.

This paper shows that in Germany:

• Healthy, plant-based diets are more effective at reducing land and biomass use than halving food waste
• A combination of more plant-based food consumption and food waste reduction in distribution and consumption is most effective at saving resources
• Focusing exclusively on food waste reduction as a policy target can be detrimental to the overarching goal of saving resources because it deflects attention away from more effective alternatives.

In this project, a subset of Science Based Targets Network (SBTN) partners have developed an approach with Bel Group for setting Science-Based Targets (SBTs) for nature in a single dairy farming landscape. A proof of concept for determining ecological thresholds has been developed that can be used as the basis for setting science-based targets for nature within a Dutch dairy landscape.

Project partners have worked with the Initial Guidance of the SBTN, and used the Biodiversity Monitor for the Dairy Farming Sector (Biodiversity Monitor) (an instrument developed through a collaboration of FrieslandCampina, Rabobank and the Dutch chapter of the WWF) as the basis for target and Key Performance Indicator (KPI) development.