the most interesting topic you’ve researched for a fic

toxicity levels of fish in the allegheny/mon/ohio river system of pittsburgh. "why" because it was vaguely relevant for carrier class and i went down a rabbit hole. "how toxic are they" pretty toxic tbh, you're supposed to only eat one a month of most fish, one every three months for one or two fish, and you are not supposed to eat the carp at all. "how did they get so toxic" did you know us steel is still periodically fined for the clairton plant's emission levels.

bonus points for carrier class also include "most common industry in erie pa" (it's plastic), "facts about the port of erie in general", and "so exactly how long would it take to bike between pittsburgh and erie anyway".