Kathmandu: Kathmandu city has been ranked second among the most air polluted cities in the world. Air Quality Index (AQI) of Kathmandu has reached 159. Today, the city of Chingmai in Thailand is ranked number 1 for air pollution.

Chingmai's air quality index (AQI) has reached 176. The third number is the city of Delhi in India. The air quality index (AQI) here has reached 157. According to the standards of the World Health Organization, AQI should be less than 35.

An IQ of up to 50 is considered normal. Doctors say that quality AQI above that is unhealthy. Due to air pollution, problems such as lung cancer, heart disease, stroke, heart attack are seen, so experts have urged people to be careful.