Assertion: ivy's growth | /r/CapableOf | double since 1960
Facets:
Source sentences:
text: Poison ivy's growth and potency has already doubled since the 1960s, and it could double again once carbon dioxide levels reach 560 ppm.
text: Poison ivy's growth and potency has already doubled since the 1960s, and it could double again once carbon dioxide levels reach 560 ppm.