Assertion: forest's number | /r/CapableOf | decrease in nearly all the boreal region
Facets:
value: irregularly
type: DEGREE
Source sentences:
text: The number of days with extremely cold temperatures (e.g., −20 to −40 °C (−4 to −40 °F) has decreased irregularly but systematically in nearly all the boreal region, allowing better survival for tree-damaging insects.