The Ripple Effect: Water-Energy-Food Nexus

Studies estimating that the global demand for water, energy, and food will increase by 55%, 80%, and 60% respectively by 2050.

In Rule of Experts: Egypt, Techno-Politics, Modernity, Timothy Mitchell tells how in 1942, an epidemic of gambiae malaria in Egypt was caused by a perfect storm of interactions between rivers, dams, fertilisers, food webs, and the influences of World War II. It began with the building of the Aswan Dam and its storage reservoirs around the Nile, which provided the anopheles mosquito with new breeding spots. Thanks to the dams, basin irrigation was replaced by perennial irrigation, encouraging a denser population of humans who no longer needed to disperse to avoid flooding. Government protectionism on behalf of the sugarcane industry then helped it expand at the expense of food-growing lands, while new irrigation techniques led to reduced soil fertility. When ammonia was diverted from fertilizer to explosives manufacturing for World War II, the resulting malnourishment and closely populated settlements created an easy target for this particularly social mosquito.

Splitting technological, agricultural, epidemiological, and geopolitical considerations into separate boxes led at least in part to the epidemic. The engineers building the dam could never have imagined the ripple effects their work created. But today, we know better (well, somewhat at least: it’s worth noting that deforestation has been strongly linked to the Ebola epidemic). And, with studies estimating that the global demand for water, energy, and food will increase by 55%, 80%, and 60% respectively by 2050, those ripple effects are going to be all the more critical – especially between these three areas...

Read more at oecdinsights.org

Originally published on OECD Insights on 21 November 2014.

More:

www.oecd.org/water




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