Particulate matter, a class of air pollutants, includes

Particulate matter includes soot, pollen and fly ash, all solid or liquid airborne particles.

Statement 1, soot, is a fine carbon particulate and part of particulate matter.

Statement 2, PAN, is a gaseous secondary pollutant, not a particulate.

Statement 3, pollen, is a natural airborne particle counted as particulate matter.

Statement 4, dioxins, are toxic organic compounds, not classed as particulate matter.

Statement 5, fly ash, is a fine solid residue of combustion and a particulate.

Particulate matter is graded by size into coarse, fine and ultrafine fractions.