Bushfires are part of Australian ecosystem for thousands year

Wildfires can start from human activity - either accidentally or deliberately - or can start by natural causes like lightning. Bushfires often pass in just a few minutes but can smoke for days. Despite all its negative impacts, why academics and environmentalists think that fires on the bush are good for the ecosystem?

A house burnt down by bushfires is seen in Laidley, southeast Queensland Source: AAP