Is this true? The air quality is pretty bad in Gangtok. I thought the air quality was below moderate here, or I was just unaware. But what are these? Is it some kind of exaggeration, because it seems unbelievable?

Is this true? The air quality is pretty bad in Gangtok. I thought the air quality was below moderate here, or I was just unaware. But what are these? Is it some kind of exaggeration, because it seems unbelievable?