Honeysuckle is killing forests and ivy is helping, especially in the northeast/midwest. Kill all that shit, help stop it from spreading. And try to volunteer for local groups that are clearing invasive species. It's pretty amazing seeing a forest before and after invasive species have been removed.
Can I kill Japanese knotweed by becoming its first predator in the Americas or do you have to light it on fire and salt the earth to get rid of it?