The rice fields on the outskirts of Hanoi are in the summer - autumn crop harvest. Farmers maintain the old routine of burning straw after harvest, creating dust and smoke.

The burning is repeated during the harvest season in Hanoi.

Farmers said they now cook by gas. They don’t know what to do with straw so they have to burn it to have ash to fertilize trees.

Piles of straw and grass smolder all day and night, blowing smoke into the sky.

The sky in some suburban areas in Hanoi has been covered by smoke in the past few days.

According to medical experts, smoke can cause respiratory diseases.

Photo: VnExpress

Complied by VNF