Sometimes, words and phrases are repeated so often that we don’t notice when they lack real definitions. Researching the use of glyphosate and other herbicides in California forests for my Substack column last month brought one of these instances to the fore. In this case, the terms are natives, non-natives, and invasive species. If you look at how the U.S. Forest Service, California State Parks, and other agencies justify their herbicide use, it rests…