Assertion: photochemical smog | /r/CreatedBy | reaction
Facets:
value: between sunlight
type: TEMPORAL
Source sentences:
text: Photochemical smog is a unique type of air pollution which is caused by reactions between sunlight and pollutants like hydrocarbons and nitrogen dioxide.
text: Photochemical smog is a unique type of air pollution which is caused by reactions between sunlight and pollutants like hydrocarbons and nitrogen dioxide.