In daily life, when usually we talk about different societal issues, pollution seems to be the hot topic. Off late, in Delhi, India, there was a warning on the air in the city and surrounding areas is unfit to breathe. Several contributors triggered this issue. Crackers, vehicle emissions, dust etc.

But, this was not the first time we saw an alarming situation in the city. Not just Delhi, but other major metros in the country seem to be victims. Recent news mentioned, Bangalore would also witness the odd and even scheme. This brings a question as to why is this a persistent issue.

With winters setting in, many cities in India face issues with visibility and breathing. While winters are supposed to be a season of enjoyment and fun, to snuggle up in the cold, our country doesn’t seem to enjoy this.

So what exactly is the difference .

The early mornings in the cold weather wake us up to fog and mist. A beautiful and serene view where tiny droplets of water get combined with air. Thickest fogs tend to occur in areas with high industrialization. This is probably why we see Delhi and other northern states of India with thick fog conditions leading to disruptions in normal life.

When this fog is mixed with toxic smoke, it reacts with sunlight forming ozone, thus leading to smog. The toxic air released by industries and vehicles daily lead up to pile on. This is not an enjoyable state as it leads to serious medical disorders that include respiratory and cardio vascular diseases. Children are also affected by smog.

Haze is a condition that tends to affect visibility. It is the occurrence when light reflects off the tiny pollutants in the air. The contributors of haze are usually smoke emitted from different sources such as industries and vehicles.

Vog occurs in areas which are more volcanic. The onset of a volcanic eruption leads to release in sulphur dioxide which reacts with air and other gases. Again leading to poor visibility. Also, leading to slight change in the colour of landscape.