The sustainability of a city depends on if the city has the ability to take care of all the basic necessities of all of the people in different parts of the city. With most of the focus of how a city is sustainable is of the urban infrastructure of the city as the use of renewable energy like wind and solar energy are integrated in the urban developments. This integration can cause the production of natural gas that can help give more heat and clean power to the city. A main and effective way that this can be implemented in urban development is adding green architecture. Making buildings have solar panels or wind turbines around cities. With Hydroelectric power sources like the Grand Coulee Dam being a big way to give large amounts of clean electricity. With that dam specifically, recorded at an annual amount of 21 billion kilowatt hours of electricity which is enough to power 2 million houses. Hydroelectric power is the largest renewable source of energy in the world right now with it even if being expensive upfront it will be beneficial in the long run as it will grow to be inexpensive and can meet peak electric demand. On top of large amounts of  electricity production it sustains the city by also providing flood control, irrigation support, and clean drinking water.