This video shows how to use SolidWorks Sustainability to make a model more sustainable. SolidWorks Sustainability can also be used as a way to find alternative materials to use. This tool can help out a lot in courses dealing with materials or any project design based course. By specifying a number of different parameters such as where and how a product is planning on being made, results will be given showing the impact to the environment. This provides a baseline on which modifications can be made in order to try to reduce the products impact.
I hope this will help you in creating more environmentally friendly model.