In Building Design, we learned how to design a multi-residential building paying attention to site considerations, environment and region, use of building and space requirements. We learned how to make design choices to improve the mechanical features of a building to make that building environmentally friendly, net zero energy, or even net positive energy. It is possible to make a building that releases energy back into the grid, cleansed air back into the atmosphere, and cleaner water back into city’s water system.