How is the salsify plant introduced to a area?

yes

If you want nuclear plants, see www.nrc.gov

WHere an animal or plant lives is a Habitat.

please be more specific, like what climate is the area in? what level of vegetation is there? what species of vegetation is there?

Yes. Introduced plants often have no natural predators, and begin to overtake the current population of plants. This can have very many detrimental effects to the current population of animals,...