This 19-slide presentation introduces students to basic concepts in Ecology and Alternative Energy. It was designed with ESL/ELL students in mind, but could be a good introduction for any students just learning about Ecology. It contains slides on producers, consumers, decomposers, food chains and webs, and several kinds of alternative energy. The slides have hyperlinks where students can learn more information, as well as videos and virtual tours that they can view as they learn. Teachers can use these PowerPoints to teach a mini-unit that's maybe 2 hours long, but they can also let students explore the PowerPoint (and its many hyperlinks) on their own.