Table 1.

Reduction in particulate matter (PM 2.5).

Countries	Average PM 2.5 during lockdown 2020 (μg/m3)	Reduction compared with 2019 (%)	Reduction compared with prior 4-year average (%)
Los Angeles, USA	5.5	−31	−51
UK	16.2	−9	+6
China	35.1	−44	−50
Italy	16.7	+30	ND
Spain	6.4	−11	+2
New York, US	4.4	−25	−29
Brazil	10.1	−32	−26*
South Korea	24.1	−54	−32
India	32.8	−60	−55

ND, no data.

^*data is compared on the basis of a 3-year average rather than a 4-year average. Source, https://www.iqair.com/world-air-quality-ranking.