
I am currently a graduate student studying geology, and one of my classes (actually an environmental science class; not geology) is called "Hazardous Waste Management".
I will need to write a research paper as a project for this class, with the topic being any kind of issue/site/event which involves hazardous waste. For now, I just need to choose a topic.
I came here for ideas because I would like to choose a topic which involves animal agriculture, since I have long been wanting to improve my knowledge of the environmental problems of animal agriculture. What sort of environmental issues within animal agriculture would you most strongly recommend that I research (so long as these issues involve some kind of handling/disposal of hazardous waste)?
I'm thinking of the enormous shit pools that result from factory farming. I'd maybe like to research how this filth gets disposed of, and the adverse effects that it has upon the surrounding environment and people's health.
Any input is welcome! Thank you.

P.S. For anyone who's interested in my project, I will update my progress here and leave it open to suggestions for improvement.