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Ambient air pollution is a major health risk globally. To reduce adverse health effects on days when air pollution is high, government agencies worldwide have implemented air quality alert programmes. Despite their widespread use, little is known about whether these programmes produce any observable public-health benefits. We assessed the effectiveness of such programmes using a quasi-experimental approach.

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This study by the International Gas Union (IGU) highlights the interconnection that exists between reducing greenhouse gas emissions and reducing emissions of other air pollutants.