The average in Beijing for the same period was 95.[11] Delhi's air is twice as bad as Beijing's air.[2] As of October 2017, experts in several monitoring stations have reportedly measured an air quality index (AQI) of 999. According to said experts this is the equivalent of smoking 45 to 50 cigarettes a day. This has led to some government officials, such as Arvind Kejriwal calling the nation's capital a "gas chamber".[12]