2019 has seen air quality remain high on the public and political agendas. The UK Government launched its new Air Quality Strategy, tackling a broad range sources including traffic, wood burning and agriculture. Increasing numbers of countries and cities are making long-term commitments to phasing out petrol and diesel cars, increasing the focus on non-exhaust vehicle emissions, as well as current real-world exhaust emissions. As evidence of the health impacts of air pollution increase, cities are investigating and introducing new measures to meet EU Limit Values and protect their citizens. The demonstrators who are taking to the streets and demanding urgent action to tackle our climate crisis are also demanding clean air.