Question

what are blur green algae? ​

Answer 1

Answer:

Blue Green Algae are also Cyanobacteria... Cyanobacteria, also known as Cyanophyta, are a phylum of Gram-negative bacteria that obtain energy via photosynthesis.

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Answer 2

Explanation:

Blue-green algae are actually types of bacteria known as Cyanobacteria. They normally look green and sometimes may turn bluish when scums are dying.