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Opinion: Wildfire smoke kills thousands of Californians a year. It doesn't have to be so deadly
LA Times via Yahoo News Singapore· 4 days agoThe particles are so tiny, they can travel deep into the lungs and even enter the bloodstream....
Airthings Renew air purifier review: Sleek but expensive
Tom's Guide via Yahoo News Singapore· 2 days agoWhile other air filters have a three-stage process to clean the air, the Renew system adds a fabric...