It shows how heatwaves triggered wildfires in the northwestern United States and heatwaves accompanied by desert dust intrusions across Europe both led to dangerous air quality in 2022.
Once labelled the world's dirtiest city by the UN in 1992, Mexico City has been making strides towards a greener future. Over the past 20 years, initiatives like "No-Drive Days" and a robust bike-sharing system have been introduced.
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