WMO air quality and climate bulletin 2022
The WMO Air Quality and Climate Bulletin reports annually on the state of air quality and its connections to climate change, reflecting on the geographical distribution of and changes in the levels of traditional pollutants. The present edition of the WMO Air Quality and Climate Bulletin provides an update on the global distribution of particulate matter for 2021, highlighting the contribution of extreme wildfire events. In response to the growing frequency and intensity of wildfires, and the projected increase of wildfire activity in some parts of the world as the climate warms (UNEP, 2022), this edition of the Bulletin explores the impacts of smoke (from wildfires and crop burning) on air quality. The present Bulletin also explores a range of possible air quality outcomes as the climate continues to warm throughout the twenty‑first century under high‑ and low‑emissions scenarios, and concludes with an overview of the implications of atmospheric deposition for air quality, ecosystem health and climate.