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1991 Darling River cyanobacterial bloom
Reference material by Wikipedia contributors. This retains its source identity and is not 411 news reporting.
The 1991 Darling River cyanobacterial bloom is the largest algal bloom on record, of the Barwon-Darling River in New South Wales, Australia.
Parts of the river were sprayed with a Copper based algaecide using a crop duster.
== References ==