Assertion: smoke | /r/MadeOf | gas
Facets:
Source sentences:
text: Smoke from wildfires contains chemicals, gases and fine particles that can harm health.
text: Gabriel da Silva, who researches the chemistry of air pollution, explained smoke contains gases, most notably carbon dioxide (CO₂) and carbon monoxide (CO).
text: Smoke can also contain toxic particles or gases, depending on the object that is burned.