WMO: Extreme fire-smoke events triple since 1990s, heat worsens ozone pollution

The World Meteorological Organization reports that extreme fire-smoke events have tripled globally since the 1990s, and rising temperatures are exacerbating ground-level ozone pollution, undermining air quality gains. The trend signals a climate-driven reversal in air quality improvements, with implications for public health and climate policy. The report is based on WMO data, but specific regional impacts and attribution remain to be detailed.