Nutrient pollution: Voluntary steps are failing to shrink algae blooms and dead zones
- Written by Donald Scavia, Professor of Environment and Sustainability; Professor of Environmental Engineering, University of Michigan

Summer is the season for harmful algae blooms in many U.S. lakes and bays. They occur when water bodies become overloaded with nitrogen and phosphorus from farms, water treatment plants and other sources. Warm water and lots of nutrients promote rapid growth of algae that...
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