Smoke, essentially

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ At times, the concentration of particulates in the air of some cities became dense enough to conduct electricity. ▪ But teamed with diesel oil in dual-fuel units, the result is less NOx and particulates plus no performance loss. ...

Wikipedia Word definitions in Wikipedia
Atmospheric particulate matter – also known as particulate matter ( PM ) or particulates – are microscopic solid or liquid matter suspended in the Earth's atmosphere. The term aerosol commonly refers to the particulate/air mixture, as opposed to the particulate ...

Wiktionary Word definitions in Wiktionary
n. (plural of particulate English).