Do nitrogen cuts benefit the Baltic Sea?

摘要

Swedish cottagers were greeted by a foot-thick scum of rotting algae on coastal island shores last summer as the Baltic Sea heaved up one of its worst cyanobacteria blooms ever.Sweden's inability to rein in the algal blooms,despite a world-class nutrient-control program,has elicited criticism of the government's tough policy of cutting both nitrogen and phosphorus.Now,a panel of five eminent North American scientists has released a report that supports Sweden's stand on phosphorus,but they remain deadlocked over how to handle nitrogen.