Why don't you just Google "fertility microplastic", read a bit and then decide for yourself

I don't know why you think that would be better than using AI? I asked a specific question and got a detailed answer which (e.g.) differentiated between biological fecundity and achieved fertility.

does your language model cite sources, or generate them too?

Yes it does. I looked at several of the individual sources. If you want, I can post a link to the full response.