The transport sector is a major contributor to environmental degradation, including air and noise pollution that have negative effects to ecosystems and human health. This is particularly critical in urban areas, where the confluence of transport emissions and high population density result in adverse health impacts and substantial economic burden. The upcoming changes in the transport sector will be critical to reach targets set by the EU Green Deal. The Zero Pollution Action plans are essential tools to reduce pollution at many different levels. Through co-creation with stakeholders Net4Cities will facilitate the realization of the zero-pollution vision by 2050. The backbone of Net4Cities is this transdisciplinary approach in which the consortium members will engage with the partner cities, including ports and airports, to jointly produce new knowledge, and ensure relevance, uptake, and maximize transferability and exploitation. During the project, air and noise pollution monitoring infrastructure will be advanced and expanded in 11 European cities, including transportation hubs such airports and ports, to conform with upcoming directives and provide data for health impact assessments. The activities are designed to have long-lasting impact through both mid-, and long-term pathways, providing a roadmap for greater uptake in European cities by offering tailored, transferrable, evidence-based support for implementing effective management strategies for reducing transport-related emissions. The main project results will be consolidated in the Net4Cities Studio which will provide (1) a web-based interface with real-time maps and information to raise awareness, and (2) a support tool for policy decisions that will provide guidance for operationalization and recommendations of solutions that consider innovative technologies such as dynamic traffic management systems and inclusion of nature-based solutions in overarching policy designs.

The COMPAIR innovation project is designed to bolster citizens' capacity to monitor, understand, and change their environmental impact, both at a behavioural and policy level. It unlocks the power of the wider public, including people from lower-socio economic groups, to provide broad granular data around a central theme of air quality, complementing and improving the quality of official datasets and making new information useful for helping to meet environmental aims. The project will achieve its aim by empowering people using a Citizen Science Lab - with a special focus on women, young people, and hard-to-reach groups ? to provide the skills to co-design and undertake environmental scientific experiments around needs and challenges in their locality. By providing innovative, self-assembly, low-cost sensors, dynamic dashboards, and augmented reality tools for collecting, visualising and extracting actionable intelligence from data, anyone regardless of their background, can understand their impact on the environment and explore immediate actions to improve it. Beyond helping to mitigate bad environmental habits at an individual and community level, CS (Citizen Science) data will also be used to mutually enrich other public and private data sources in official city decision making platforms. Thereby helping to increase civic engagement and influence more effective long-term environmental policy. Piloted in the Region of Flanders and the major cities of Athens, Berlin and Sofia, communities, businesses, researchers and public administrations will, for the first time, adopt and benefit from a technology-enabled, collective approach to evidence gathering that fills gaps in existing data sources, and provides new routes to innovation. COMPAIR will raise awareness of, and provide a CS Lab Toolkit, to ensure CS is a trusted approach to tackling complex, systemic and environmental problems that require different perspectives.