Before and after footage shows the dramatic drop in air pollution over Chiang Mai in northern Thailand.

Footage from June 12 shows clear and bright skies, as humans stay indoors under lockdown due to the coronavirus pandemic.

The opening clips, shot in March 2020, show a more typical smoggy landscape.

With quarantine, businesses closed, and travel restriction, there has been a significant worldwide decrease in carbon dioxide emissions.

Chiang Mai in Thailand was experiencing some of the world's worst air pollution earlier this year, reaching hazardous levels. Since the Covid 19 pandemic, air quality has improved dramatically, reaching WHO safe standards. Few vehicles, tourism at a standstill, travel restrictions are the major factors.
The opening clips were shot on March 2020 when one monitoring station was indicating an AQI of 498 for PM 2.5 particles. Nowadays, 25 is common.