“New Delhi may be the world’s most polluted city, but it’s making an effort to relinquish that title. With pollution from particulate matter at potentially lethal levels early last December, city officials took a drastic step: they announced that they would temporarily restrict the use of private vehicles by allowing owners to drive only on alternate days, based on the sequence of their number plates.
“The initial results of that 15-day trial, which began on 1 January, are now in. Although traffic actually increased in the first week of the ban, the levels of PM2.5 — particulate matter measuring less than 2.5 micrometres across — fell by roughly 10%. That is a victory not just for New Delhi officials, but also for the scientists who sprang into action to collect the data necessary to determine whether the test had achieved its goal.” nature.com. Read the full article on delhiair.org.
New Delhi car ban yields trove of pollution data