WORLD Insecticide-treated nets are widely considered a magic bullet against malaria—one of the cheapest and most effective ways to stop a disease that kills at least half a million Africans each year. But many recipients don’t use the nets for their intended purpose—instead, they sew together anti-malaria nets into gigantic sieves that trawl the bottom of the lakes and wetlands, culling some of Africa’s most … Continue reading Malaria Nets Keep Mosquitoes Out . . . and Fish In