Building the World

Why is an Orange like a Light Bulb?


The water-energy-food nexus may influence the growing of oranges, in competition for lightbulbs and drinking water. Image: wikimedia commons.

Did you know that growing one orange requires 13.8 gallons of water? Next time you crunch into an almond, you’ll consume the result of one gallon. California grows both: a result, in part, of the Colorado River Compact. Edward Spang of the University of California Davis, as well as colleagues including David H. Marks of MIT, predict competition for water use will increase in the water-energy-food nexus. Spang developed a water consumption for energy production (WCEP) indicator, comparing the use of water for different forms of energy in over 150 countries. Fossil fuels and biofuels require the most water; wind is less thirsty. The United Nations cites the World Water Development Report: “If water, energy, and food security are to be simultaneously achieved, decision-makers, including those responsible for only a single sector, need to consider broader influences and cross-sectoral impacts. A nexus approach is needed.”

For more: Spang, Edward. “A Thirst for Power: A Global Analysis of Water Consumption for Energy Production.” GWF Discussion Paper 1246. Global Water Forum, Canberra, Australia. also see:

“Multiple metrics for quantifying the intensity of water consumption of energy production.” E.S. Spang, W.R. Moomaw, K.S. Gallagher, P. H. Kirshen, and D.H. Marks. 8 October 2014. Environmental Research Letters, Volume 9, Number 10.

Ahuja, Satinder, Editor. Food, Energy, and Water. Elsevier 2015.

Building the World Blog by Kathleen Lusk Brooke and Zoe G Quinn is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

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