Question

Which is invisible pollutants

Answer 1

The smallest particles can cross the alveolus-capillary barrier and make their way into the bloodstream. Invisible pollutants (nitrogen oxides, sulfur dioxide, volatile organic compounds, carbon monoxide) also pose a threat to health

Answer 2

Particulate emissions (the visible pollutants) can be inhaled into the nose and lungs. Invisible pollutants (nitrogen oxides, sulfur dioxide, volatile organic compounds, carbon monoxide) also pose a threat to health.

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