Cause of Lake Erie's harmful algal blooms gains more certainty
from Circle of Blue
Changes in the timing and method of applying agricultural fertilizer are the primary drivers behind the increasing amounts of phosphorus entering Lake Erie and causing toxic algal blooms and a large dead zone, according to new basin-wide scientific studies. The studies, drawing on institutions from across the Great Lakes, also found that climate change is increasing the urgency of developing ways to keep fertilizers on fields and may mean that larger reductions in phosphorus will be necessary to alleviate Great Lakes algal blooms.
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