Leading pulmonologists in Delhi are saying that reports of lung cancer in non-smokers has quadrupled in the last 15 years.
"No Indian today is a non-smoker," said Dr Arvind Kumar, a lung cancer surgeon at Sir Ganga Ram Hospital.
They are also much younger that the average lung cancer patient in other countries, in their 30s and 40s.Those who spend time indoors are not safe either.
"The incidence of breast cancer in India was 1 in 200 in 2002.
"The ICMR in 2016 now predicts one in 11 women staying in metros will get breast cancer."