8:30am PDT - April 15th, 2022

Masks decrease risk of particulate pollution when we inhale. Mask #Quality & application defines its optimum effectiveness. Filtration is also used for water & mechanical systems. Do you make your coffee without filtering out grounds? #Science #COVID19 #CdnPoli #STEM #CPCLdr https://t.co/bpQdaOYMlK https://t.co/e5ld2I27eK

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