Clean Air policies in the UK and China have substantially improved air quality in recent years. However, reaching the new WHO guidelines on air pollution exposure to protect health remains a major challenge in both countries. Ambitious climate policies have already delivered significant co-benefits to air quality in the past. Future net zero or carbon neutrality policies may offer opportunities to contribute to improved air quality towards meeting the WHO guidelines. However, some climate

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... es have potentially negative impacts on air quality. An immediate policy challenge is to develop the underpinning science to formulate policies to maximise the co-benefits of net zero and carbon neutrality measures on air quality and health, and to minimize their disbenefits. Leveraging existing world-leading UK-China strengths in air quality, climate, health and data sciences, the overall aim of COP-AQ (funded via the Global Research and Innovation Programme, GRIP) has been to develop a joint research agenda to determine how net zero / carbon neutrality policy options can be optimised to maximise co-benefits for air quality and health and to enhance cross-disciplinary capacity to deliver such an agenda.