Assertion: stratospheric ozone | /r/MadeOf | the interaction of sunlight
Facets:
value: with hydrocarbons
type: OTHER
Source sentences:
text: It does not have any direct emissions sources, rather it is a secondary gas formed by the interaction of sunlight with hydrocarbons – including methane – and nitrogen oxides, which are emitted by vehicles, fossil fuel power plants, and other man-made sources.
text: Tropospheric ozone is formed by the interaction of sunlight, particularly ultraviolet light, with hydrocarbons and nitrogen oxides, which are emitted by automobile tailpipes and smokestacks.