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The first decade of the 21st century witnessed a tipping point: For the first time in human history, more people live in metropolitan areas than outside them. The world’s population, which doubled from 3 billion in 1960 to 6 billion in 2000, is projected to reach about 9 billion by 2050 before leveling off. Two-thirds of the world’s population will then live in metropolitan areas. This will stress on the world’s ecological, economic and political systems more so than presently.
Development in the US between 2005 and 2040 will further stress systems. More than 100 million new Americans are expected along with about 60 million new jobs. Two million homes will need to be built each year and non-residential construction may top two billion square feet annually. The Wasatch Front may double to more than four million people holding 2.5 million jobs. More than three-quarters of all non-residential space existing in 2000 will be rebuilt, as will a quarter of all homes. Nationally, development during this period is projected to exceed in volume two-thirds of everything built today, at a cost of more than $50 trillion; development in the Wasatch Front will exceed $500 billion.