Last week Delhi recorded an alarming all time high pollution level at 2000 micrograms/cubic metre whereas the healthy limit is just 50. Our cities are choking! Air pollution has reached frightening levels in not just Delhi but also in Gurgaon, Gwalior, Patna - you name it and the air quality index is in red. We did a market survey to find out if air purifiers are the only available solution to purify the poisonous air we are inhaling.