Glacial warming’s pollutant threat

From Washington, D.C., at the 166th annual meeting of the American Association for the Advancement of Science

Every summer, certain lakes in the northern Rockies receive a rich input of long-banned air pollutants. A tiny crustacean has just pointed scientists to an unexpected source—glaciers.

Oily, semivolatile pollutants can spend years leapfrogging around the globe, by repeatedly evaporating and settling, until they reach cold climes and can’t re-evaporate (SN: 3/16/96, p.