The author has used problem-based learning for many years, especially in courses for green chemistry and polymer science. Instructors cannot cover as much material as they can in a straight lecture, but this method can enable the students to remember more of the material after the end of the course. It also teaches how to analyze and solve real problems. This is a useful book for anyone teaching a green chemistry course, and some of the examples would be useable in a general chemistry course as well.