Assertion: methane | /r/HasAspect | short shelf-life
Facets:
value: relatively
type: DEGREE
value: compared to carbon dioxide
type: OTHER
Source sentences:
text: But, compared to carbon dioxide, as well as other heat-trapping gases, methane has a relatively short shelf-life; it lasts an average of only nine years in the atmosphere, while carbon dioxide, for instance, can persist in the atmosphere for about a century.