@flisk "For both species of tree, higher levels of artificial light meant tougher leaves. The tougher the leaf, the less evidence of insect herbivory. The more intense the light, the more frequently scientists encountered leaves that showed no signs at all of herbivory."

underlying mechanism already existed and is not a mutation caused by humans, meaning it is reversible - how you reverse it is up to debate but "muh streetlights" ain't it