Assertion: methane | /r/HasProperty | important greenhouse gas
Facets:
value: over a 100 year period
type: TEMPORAL
value: compared to co
type: OTHER
Source sentences:
text: Methane is an important greenhouse gas with a global warming potential of 34 compared to CO 2 (potential of 1) over a 100-year period, and 72 over a 20-year period.
text: Methane in the Earth's atmosphere is an important greenhouse gas with a global warming potential of 25 over a 100 year period.
text: Methane is also an important greenhouse gas: it has about 23 times the global-warming potential of carbon dioxide when it is released into the atmosphere.