The haze now engulfing Sydney isn't an isolated problem. Cities around the world struggle to manage the many sources of tiny airborne particles and the discomfort and illnesses these cause.
Research shows previous fires increased child mortality and reduced growth rates.
Zero-burning policy could hurt small-holder farmers. The ban on the use of fire for land clearing has raised the costs to prepare their land for planting and to keep it pest-free.
Leaders in Jakarta want to tackle the haze crisis but they don't have much authority over corrupt local elites.