In which pollution zone of the river, growth of algae reappear?

Related MCQs

• In which pollution zone of the river, the dissolved oxygen reduced to 0?
• Which is the third zone of pollution in the river?
• For controlling the growth of algae, the chemical generally used is
• For controlling the growth of algae, the chemical generally used is
• The pollution zones in the river are divided into how many types?
• The presence of algae in water indicates that the water is
• For controlling algae, the chemical generally used is
• The presence of algae in water indicates that the water is
• Which of the following is the major source of environmental pollution in urban areas?
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