<ul><li>Air pollution in Thailand's Chiang Mai reaches hazardous levels, prompting authorities to urge people to stay indoors and work from home.</li><li>Chiang Mai ranked as the most polluted major city in the world by air monitoring website IQAir, surpassing Delhi and Lahore.</li><li>The levels of PM2.5 particles, which can enter the bloodstream, were more than 66 times the WHO's annual guideline in Chiang Mai.</li><li>Thailand has seen a spike in air pollution caused by seasonal agricultural burning, leading to nearly two million people requiring hospital treatment.</li></ul>

Work-from-home order issued in this city as pollution reaches hazardous levels

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