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47Addressing global ozone pollution challengesMeanwhile, Prof. Guo%u2019s team posed a related question: how can the growing global challenge of ozone pollution effectively be addressed, particularly in the context of a warming climate and the complexities of surface ozone? %u201cEvidence indicates widespread increases of ozone in the troposphere %u2013 the lowest level of the earth%u2019s atmosphere,%u201d explains Prof. Guo. %u201cSurface ozone, in particular, is chemically complex and difficult to tackle. Despite some past successes, we still need a way to tackle the new challenges of ozone pollution in a warming climate.%u201d Prof. Guo%u2019s team analysed surface measurement data at 4,300 sites around the world between 2014 and 2019 to highlight the emerging global challenge posed by ozone pollution, especially the unintentional rise in ozone levels due to uncoordinated emissions reductions and the worsening effects of a warming climate.%u201cOzone pollution and climate warming are connected in important ways,%u201d continues Prof. Guo. %u201cThey have similar sources, they interact chemically, and they can harm human health in similar ways. Therefore, we have proposed a new approach that combines efforts to reduce ozone and fine particulate matter. This new approach presents an opportunity to reduce ozone pollution in the troposphere during the upcoming transition to low-carbon emissions.%u201dThanks to their curiosity and expertise, the air research team has positively impacted the fight against air pollution, improving air quality while protecting the health and the lives of the most vulnerable members of society.TAKE A DEEP BREATH