Question

What cause algal bloom in water

Answer 1

Nutrients promote and support the growth of algae and Cyanobacteria. The eutrophication (nutrient enrichment) of waterways is considered as a major factor. The main nutrients contributing to eutrophication are phosphorus and nitrogen.

Answer 2

runoff of excess water from fields deposits on the surface of water bodies providing excess nutrients to algae and they grow so much that god level of water reduces