"The majority of us are consumers. Whether we are the end-users of the product or not, each and every purchase that we make has an impact on the environment. Being aware of this and acknowledging our consumption patterns is important for sustainability because everything we consume requires materials and energy from nature."
Invite your students to learn about this economics topic. Get background at https://www.facingthefuture.org/blogs/news/consumerism-a-vicious-cycle?
Facing the Future also has resources for sale, such as "Big World, Small Planet - Module 4, Wants Versus Needs: Pushing the Boundaries," which helps students:
Examine how consumption patterns are important to sustainability
Understand how consumption affects economic and social systems
Learn about climate change and its impact on today as well as our future
Available as a classroom set, or as a single student edition, or teacher edition.