Assertion: airplane | /r/CapableOf | increase by up to 0.2%
Facets:
value: since the birth of aviation
type: TEMPORAL
Source sentences:
text: Airplanes operating at high altitudes near the tropopause (mainly large jet airliners) emit aerosols and leave contrails, both of which can increase cirrus cloud formation – cloud cover may have increased by up to 0.2% since the birth of aviation.