India, Dec. 22 -- He started his tea stall in New Friends Colony, three years ago, because I wanted to do something of my own, but now, 24-year-old Sharif Khan is worried he may have to quit because of the pollution. "It is very difficult. Standing outside the entire day with this air makes my entire body feel very weak, and a cough and cold have become constant problems now. It is becoming too much, and I feel worried that I may have to quit this job," Khan said. His daily shift lasts around 12 hours on average: he opens the stall at 10 in the morning and closes it at 10 in the night. "The pollution definitely increases in the evenings, as I can feel more smoke in the air. However, I have no choice but to continue working, as the evening ...