In addition to working with local authorities, the Department for Transport and the Department for Environment, Food & Rural Affairs needs to ensure it is working with other sectors with either an interest in, or an influence on, air quality, such as the Department for Business, Energy and Industrial Strategy and the Department for Levelling Up, Housing and Communities.53 Clean Air in London also highlighted to us the need to view the Government’s plans, spending and action, or lack thereof, to tackle air pollution in the wider context of: ‘One air’, covering both local air pollution and greenhouse gases.54 Similarly, UK100 highlighted the potential benefits of taking an integrated approach to clean air and net zero, while also warning that there are some areas where local authorities will need to carefully consider their approaches to ensure that policies do not have unintended consequences – as experienced with the promotion of diesel vehicles as more fuel efficient, which led to increased levels of NO2, worsening local air quality.55