Anti ragweed: a good idea?

CBC talks to a woman intent on eradicating ragweed in her part of town.

The brief article doesn’t say anything about ragweed’s role in the ecosystem, whether it functions as a food source for useful insects or anything else – whether it would be a good idea to erase it from the city. I know it’s still the silly season but surely somebody at the botanical garden should have something to say about it.