The algae erupted heavily in Hoan Kiem Lake after dredging

In recent days, the surface of Ho Guom water surface has many large green areas, which are suspected to be blue algae after the dredging period. Environmental experts say this is a toxic algae that could threaten the water environment of Hoan Kiem Lake.

The corner of Hoan Kiem Lake, near the Thang Long Puppet Theater, appears a lot of blue scum.

According to Prof., Dr. Duong Duc Tien (Expert on algae research) said that this is a type of cyanobacteria, not beneficial to the water environment and need to be recovered and removed.

The area of ​​this cyanobacteria covers very quickly, causing many ordinary people to be in the area of ​​curious and worried lakes.

"People here have a lot of questions. Somehow, after trying to clean up the lake, there are so many green areas in this area, seeing that the fish is dead and people are afraid there is something unusual" .Ms. Thuy, a photographer near Ngoc Son Temple said.

Looking closely, it can be seen, the size of each of these green spots is very small, they are joined together into large pieces floating on the lake surface.

The dense green area appears at the corner of the lake near Thuy Ta ice cream restaurant.

The precipitate is like green smoke on the water.

A few months ago, Hanoi spent nearly 30 billion VND to renovate, dredge and clean the lake's environment.

Blue covers the water surface.