Fig. 4.

Lockdown geographical coverage and differences in PM_2,5 emissions comparing 2020 and 2019 in the SMA.. Colour legend: blue means zones (communes) without mandatory confinement, red indicates zones with mandatory confinement. Mandatory lockdowns started on March 27 for 7 northeast communes (partial lockdown 1). On April 23 a group of 8 central-southern communes were under confinement (partial lockdown 4), moving into total lockdown from May 15 onwards. Black dots in figure a1 show three areas of the city (LC: Las Condes; PO: Parque O'Higgins and PA: Puente Alto). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)