Programs and Communities

An increase in population and need to protect the planet has created many initiatives and research goals in developing alternatives methods of fueling. Federal and state policies have provided a push for industries to find ways to of reducing their impact on the environment while maintaining competitiveness. In the sector of alternative fuels, large policies such as the Renewable Fuel Standards (RFS) in the United States are making goals to reduce vehicular fuel from coal and oil, and focus on alternative fuels such as ethanol and biodiesel. Along with the RFS and other federal policies, states are introducing independent initiatives to promote the use of alternative fuels.

Research has shown that other crops besides corn can feasibly be used to produce ethanol for fuel use. One of the major crops of interest currently is switchgrass (Panicum Virgatum L.) because of its ability to grow under a variety of weather conditions and soil types. Switchgrass does not require as much maintenance as corn and is a perennial grass that can have high yielding fields for up to 9 years.

This report focuses on the impacts from using switchgrass-derived ethanol to meet the state of Arizona’s policy to have government fleet vehicles operating on alternative fuels. The study uses a life cycle assessment (LCA) approach to evaluate 22 million gallons of ethanol produced in Arizona and stored at fueling stations for use. Impacts in land use, global warming, and water quality are evaluated using software tools and databases in Ecoinvent and Simapro.

The results of the study indicate that the cultivation and harvest phase of the process will contribute the most to negative environmental impacts. According to the study, application of heavy nutrient fertilizer and the machinery needed for the additional agriculture have the potential to contribute over 36 million moles of hydrogen and 89 million CTU eq. to the air, soil, and water.

This project is creating a non-profit green building organization called AZ Build Green Coalition. There is currently no statewide neutral organization for knowledge sharing about various green building initiatives throughout Arizona. Multiple municipalities in the state are now interested in and starting to execute green building initiatives through varied processes. Yet, each municipality is remaking the wheel and select green building champions in each city usually lead these efforts without a lot of funding or capacity. A central source for knowledge sharing and education would be instrumental in facilitating faster and more efficient movements with green building initiatives and codes. For example, the city of Scottsdale is in the process of being the first municipality in the nation to adopt the newest version of the International Green Construction Code (IgCC). This project has been involved in and aided in that initiative. The city of Tempe has initiated three IgCC 2018 pilot projects. Other municipalities in the state are interested in the IgCC and several have previously adopted it on a voluntary basis. Sharing resources and code approval barriers through a central forum would be beneficial for faster progress and also navigating the political barriers more effectively. The non-profit aims to assist with this collaboration and future high performance building initiatives through tools such as: public presentations, a central sharable document repository, an online presence, and other collaborative tools.