The UK government launched the latest clean air strategy to tackle emissions from different source types (e.g. agriculture, industry) rather than simply meeting air quality targets in isolation. It emphasizes the wider impact of emission on health and the environment.  In the UK, much of the debate on emission has focused on the roadside problems where pollution exceeds limits. Things are slowly getting better due to local actions and newer vehicles. The concentrations of nitrogen dioxide in UK have declined. The new strategy reconfirmed this trend and restate the long-term target of phasing out fossil fuel vehicles. It also recognizes another concern, i.e. PM 2.5, which pose a major health risk and it recognizes the World Health Organisation limits for PM 2.5 as well as includes an ambition to address this problem.  The multi-pollutant approach of the strategy includes proposals for specific actions and general ambitions for reductions. For example, it includes proposal for gradual retirement of diesel trains, voluntary labeling of solvents in consumer products, tackling the issues of ammonia emission from agriculture as well as managing indoor air quality. This kind of wider focus approach can make sense since different source types can interact with one another. Real improvement can only be achieved by simultaneously reducing emission from different sectors.  In addition to delivering good air quality at the local level, the new strategy emphasizes the need to manage air pollution at an international level. The National Emissions Ceiling Directive (NECD) set limits on pollution emissions from each EU country. Since the UK’s commitments to reduce emissions are mirrored in United Nations convention on long-range air pollution, Brexit will not change things. A focus of the strategy indicates UK’s intentions to reduce trans-boundary pollution. It seems likely that national targets may easily be met but increasingly tough international emission targets may become new legal compliance challenge to the UK government. For the government, it is easy to measure concentration of pollutants in the air but it is difficult to capture all benefits, e.g. the improvements to the wider focus.