It took a decade of court battles and street protests, but Balkan activists fighting to protect some of Europe’s last wild rivers have scored an important conservation victory in Bosnia. A new electricity law, which passed Thursday, bans the further construction of small hydroelectric power plants in the larger of Bosnia’s two independent entities. Still, the new law only highlights the long road ahead to protect such public rivers across the entire Balkans from being degraded, diverted and commercialized by people with connections to the region’s corruption-prone political elite. One co...