The haze is back in Malaysia – with at least two states registering unhealthy air readings on Monday as raging forest fires in neighbouring Indonesia send clouds of smoke northwards.Transboundary haze is a long-standing problem in Southeast Asia, particularly affecting Malaysia and Singapore due to their proximity to Indonesia, where vast tracts of forests and agricultural land become fire hotspots during the dry season.A wildfire scorched 550 hectares (1,360 acres) of land in the Bromo...