BUT folks, pls take note or rather don't bother too much on the PSI value... The value that is of more concern is the PM2.5 value.. These are real real harmful particles that can attack our lungs and bloodstream... so EVEN if the PSI value is low BUT if the PM2.5 is above 40, pls pls pls no outdoor activities... Its those things that we can't see that kills us slowly..
You can view the PM2.5 values at http://app2.nea.gov.sg/anti-pollution-radiation-protection/air-pollution/psi/psi-readings
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