Biology, 04.05.2020 23:46, kevinhill185

Which role do ultrafine particles play in dirty air?

They contribute to less than 13,000 premature deaths a year.
They can worsen symptoms for people with breathing difficulties.
They are easily removed from the air when people see them floating.
They are constantly filtered by the nose, which prevents lung absorption.

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Which role do ultrafine particles play in dirty air?

They contribute to less than 13,000...