Covering nearly one third of the land surface of the globe, forests make a wide range of direct and indirect contributions to human well-being. Home to most of the world's terrestrial biodiversity, they also play an essential role in climate change mitigation, removing about a quarter of the CO2 that human activities add to the atmosphere. Worldwide, millions of hectares of forests and other types of vegetation burn every year. Fire dynamics are shaped by a complex set of factors, including human activity and climate.