What’s foul and gross and green all over? China’s Taihu Lake during a massive cyanobacteria bloom. Hans Paerl, seen here scooping up some of the algae, is consulting with the Chinese to control the blooms.
Developing countries aren’t the only places vulnerable; these blooms have killed livestock who sought to slake their thirst from U.S. lakes, Paerl says. Global warming will make the problem worse because the blue-green organisms thrive during droughts and in extreme conditions.