Students in my Introduction to Physical Science, General Physics, and Physics for Scientists and Engineering courses are required to write a reflective essay on global warming as we covered the energy topic. They are also required to elaborate on what they can do as responsible citizens. Through this reflective writing exercise, students now learned that global warming is real and behooves us to respond immediately. Students also commented what they could do as individual responsible citizens, ranging from turning off unused electronics to making informed decisions about purchases. Educating students sustainability of the Earth in these courses is critical so that they can grow to become better stewards of the environment.