These kinds of languages have great value in society and it may consider especial skills for the people who can learn this efficiently. Some think it as a whole work to learn and help the people can't speak normally. Many people learn this and also keen to have a certificate after learned.
Every year during the onset of winter season, the air quality of Delhi starts showing the sign of degradation in many ways. From people facing breathing difficulty to reducing visibility, there are lots of things that clearly show that something is not right with the air of the national capital of India.