Wind, solar power increase needed to avoid global drought
The world will face “insurmountable” water crises in less than three decades, researchers said Tuesday, if it does not move away from water-intensive power production.
A clash of competing necessities — drinking water and energy demand — will cause widespread drought unless action is taken soon, researchers from Denmark’s Aarhus University, Vermont Law School and the CNA Corporation, a nonprofit research and analysis organization, said in the reports.
“It’s a very important issue,” said lead study author Paul Faeth, Director of Energy, Water, & Climate at CNA Corporation. "Water used to cool power plants is the largest source of water withdrawals in the United States,” said Faeth in a press release on two new reports released Tuesday.
“The recommendations in these reports can serve as a starting point for leaders in these countries, and for leaders around the world, to take the steps needed to ensure the reliability of current generating plants and begin planning for how to meet future demands for electric power.”
Globally, there has been a three-fold population increase in the past century and a six-fold increase in water consumption, the report said. If trends in population and energy use continue, it could leave a 40 percent gap between water supply and demand by the year 2030.
In most countries, including the United States, energy production is the biggest source of water consumption — even larger than agriculture, researchers said. In 2005, 41 percent of all freshwater consumed in the U.S. was for thermoelectric cooling, according to the study.
Power plants produce excess heat, requiring cooling cycles that use water. Only wind and solar voltaic energy production require minimal water.
“If we keep doing business as usual, we are facing an insurmountable water shortage — even if water was free, because it’s not a matter of the price,” Sovacool said.