Assertion: planet's atmosphere | /r/MadeOf | carbon dioxide
Facets:
value: mainly
type: DEGREE
Source sentences:
text: Its thin atmosphere, consisting primarily of carbon dioxide, makes it unsuitable for sustaining life, but is believed to have at one time been capable of it and might still be able in the future.
text: The thin atmosphere of Mars consists mainly of carbon dioxide which makes it unsuitable for sustaining life.