STEM is one of the most advanced and highly effective educational methods, especially in Science and Natural sciences subjects. Currently, research on the application of STEM in elementary, middle, and high schools has also attracted a lot of attention from teachers, students, and the whole society, aiming at innovative and creative development in education. Along with the changes in the 2018 general education curriculum, teaching contents have also been rearranged to promote integration, thus increasing the advantages of applying STEM teaching. In this article, we introduce one of the topics that can potentially achieve good results when applying this teaching method: “Effective use of energy and environmental protection,” Natural Sciences 9.