Assertion: gas's quantity | /r/HasAspect | 28 times
Facets:
value: over a 100-year period
type: TEMPORAL
Source sentences:
text: While the lifetime of atmospheric methane is relatively short when compared to carbon dioxide, with a half-life of about 7 years, it is more efficient at trapping heat in the atmosphere, so that a given quantity of methane has 84 times the global-warming potential of carbon dioxide over a 20-year period and 28 times over a 100-year period.