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The State and Its Resources
The Changing Energy Scene
The TwentyYear Outlook
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absorption refrigeration acre active solar additional agricultural alternative annual applications areas Arizona Public Service Arizona's energy future average biofuel biomass building capital coal cogeneration collector Colorado River commercial concentrating consumers conventional cooling costs crops disposal district heating economic efficiency energy consumption energy demand energy development energy prices energy sources energy supply energy usage environmental estimated exports facilities federal forecast fuel geothermal development geothermal energy geothermal fluid geothermal resources groundwater halophytes heat pump hot water industrial investment irrigation land located major ment million nation natural gas nuclear oil and gas OPEC operations options passive solar percent Phoenix photovoltaic potential power plants problems process heat production projects reduced residential saline sector solar energy space heating state's steam storage tax credits temperature thermal energy tion total energy transportation trillion Btu Tucson U.S. Department United University of Arizona users utility wastes