In December 2018 Tucson, Arizona became one of more than 20 other cities in North America to join the 2030 District Network. The UA's Office of Sustainability was the driving force in coordinating the partnership between UA, The City of Tucson, and Pima County. The 2030 Districts Network is a US nonprofit aiming to develop and sustain local 2030 Districts in their drive to achieve the 2030 Challenge goals of reducing water use, water consumption, and transportation greenhouse gas emissions by 50% by the year 2030. Tucson has 10 million square feet committed in its pledge to demonstrate that "high performing buildings can be the most valuable and economical buildings" in the area. With these goals in mind, Tucson and other cities will strive toward carbon neutrality, in an effort to be economically and environmentally sustainable by 2030.