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.
the only reason roundup should be used is to kill invasive. unfortunately dipshits like to use it because grass between the cracks in the sidewalk is just too much to handle