How do I tell my mom that I want to be a enviromentalist instead of a federal prosecutor?
I think that you should ease your way into it. I think that if you're too blunt she might not be as willing to listen and understand that the path she wants for you isn't what you want. I completely understand where you're coming from because my mom doesn't want me to go too far for college and that effects what majors I could take and what job I want in the future. It's a really hard concept that parents haven't fully understood yet.
Hmm. I know that's difficult. To convince your parent's, especially mom. Try explaining what your actual dreams are. It may take time, but hopefully she will understand.