Integrating engineering and science in the classroom can be challenging, and creating authentic experiences that address real-world problems is often even more difficult. "A Framework for K-12 Science Education" (NRC 2012), however, calls for high school graduates to be able to undertake more complex engineering design projects related to major global, national, and local issues. This article describes a partnership among a high school, college student group, and nonprofit organization that provides such an experience. The partnership resulted in a unit that integrated science content with engineering practices and supports the "Next Generation Science Standards" (NGSS Lead States 2013). The unit aims to help students: (1) understand the importance of conservation, calculate a personal carbon footprint, and know how to reduce it; (2) understand the science behind composting to design an effective compost bin; and (3) engage in elements of the engineering design process and successfully meet the needs of their "client," the nonprofit organization.