Dense Smoke on road could be a cause for a big accident.

PUNJAB in India.
Farmers are harvesting wheat on a very large scale and after they are done with the processing of the wheat they set the land on fire which is cause a lot of heath issues in northern India.
People are suffering from breathing problems, eye burn and skin allergies too.
Sometimes main roads go through these fields and the smoke from these fields cover the road and drives can not see anything.
These smoke clouds come all of a sudden and are so dense that visibility decreases to 1 meter or less.

Farmers are aware of these problems but for their personal profit they don't follow the rules and the government is also not so strict about it.