TEMPO Interactive, Jakarta:Minister of Transportation E.E. Mangindaan, says steps are being taken to address the smoke clouding North Sumatra. "We set a minimum visibility of 800 meters so that it can be secured," he said on Wednesday. The smoke has disrupted flights in North Sumatra province over recent days and pilot ​​visibility was reduced to 1,200-3,000 meters from 5,000 meters. Mega Sirait, a weatherwoman from the Meteorology, Climatology, and Geophysics Agency (BMKG) at Polonia Airport, said the smog that hit Medan and other cities in North Sumatra was due to firest fires. The smog has the potential to disrupt the journey of people returning home for the Lebaran holiday, especially to North Tapanuli, Asahan, Labuhan Batu, Central Tapanuli, Simalungun and Toba Samosir, where forest fires have struck.