I'm 13 years old, and in a few days I'll be presenting a seminary for my English class. It has to be related to health or to the environment, but I can't seem to find anything interesting online. Do you guys have any suggestions for me? It's got to be something serious, not stuff like "How to fix your zits" and so on. Thank you 
P.S.: Sorry for the spelling mistakes, I'm not American (I'm Brazilian).
P.S.: Sorry for the spelling mistakes, I'm not American (I'm Brazilian).