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.Dead fish at Ho Guom:
While many people believe that Sword Lake was heavily polluted, Prof. Ha Dinh Duc - who closely associated with this lake explained, dead fish is a natural phenomenon; There