which role do ultrafine particles play in dirty air?\no they contribute to less than 13,000 premature deaths…

which role do ultrafine particles play in dirty air?\no they contribute to less than 13,000 premature deaths a year.\no they can worsen symptoms for people with breathing difficulties.\no they are easily removed from the air when people see them floating.\no they are constantly filtered by the nose, which prevents lung absorption.

which role do ultrafine particles play in dirty air?\no they contribute to less than 13,000 premature deaths a year.\no they can worsen symptoms for people with breathing difficulties.\no they are easily removed from the air when people see them floating.\no they are constantly filtered by the nose, which prevents lung absorption.

Answer

Brief Explanations:

Ultrafine particles in dirty air can exacerbate breathing - related symptoms in people with pre - existing breathing difficulties. The first option about the number of premature deaths is not a general description of their role. Ultrafine particles are not easily removed just by sight and are not constantly filtered by the nose to prevent lung absorption.

Answer:

They can worsen symptoms for people with breathing difficulties.