All fine particles, regardless of their chemical composition, are equally potent in causing premature mortality.
The chemical composition of fine particles does not affect potency.
The chemical composition of fine particles is the most important consideration.
Most likely not.
All that line are grays.
The boy is wearing a red shirt
People are saying things out loud in a room.
A woman at a table with colleagues fills in a chart
The man is playing handball near the White house.