Much of the water in the U.S. West is transported across vast geographical areas by large infrastructure projects known as interbasin water transfers. Two of these projects in particular make up 85% of all energy-related greenhouse gas emissions associated with U.S. interbasin transfer—one in Arizona and the other in California—according to the new research published this week in the journal Nature Water. The project in Arizona is known as the Central Arizona Project, and in California it’s the State Water Project. “You hear a lot about these big projects and how much energy they use,” said Avery Driscoll, a doctoral student in CSU’s Department of Soil and Crop Sciences and the paper’s lead author. “We were curious how much of that was actually attributable to agriculture and what the emissions impact was.”