Environmental Science
Unintended Consequences of Building Dams on Transboundary Rivers
Quick fact
The Nile River's Grand Ethiopian Renaissance Dam reduced downstream water flow by up to 25% during filling, threatening Egypt's agriculture and sparking years of diplomatic tension.
Why this is interesting
Dams are often hailed as green energy providers, but when they block rivers that flow across borders, they can silently turn allies into adversaries and fertile lands into deserts.