“At least 15 key studies have looked at air pollution in Delhi over the last 18 years, the first three cited by the SC in its 1998 judgment on CNG in public transport. No one followed up the rest.” Article lists and provides details on each of the 15 studies, beginning in 1997 and ending in 2015. The Indian Express. Read it on delhiair.org.
Current Delhi AQI numbers
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