Jobs and Internships
The best website to go to for internships (and jobs) in the non-profit sector is Idealist.org. You can search for "Washington, DC, Metro Area" or somewhere closer to your home. You can also search by "environment" or "energy" or any number of subject areas.
The next best website (in my opinion :+) is the ENSP webpage, where you can see permanent listings of nearby organizations organized by topic areas.
And don't forget the resources pulled together by the University Career Center. You must first log in and establish an account -- but once that's done you have access to resources from hundreds of organization specifically seeking University of Maryland students.
Get started now!