Which is the third zone of pollution in the river?

Related MCQs

• In which pollution zone of the river, growth of algae reappear?
• In which pollution zone of the river, the dissolved oxygen reduced to 0?
• The pollution zones in the river are divided into how many types?
• Which of the following is the major source of environmental pollution in urban areas?
• Which of the following disease is associated with air pollution?
• Which of the following automobile will provide least pollution problems
• Which of the following is the major source of environmental pollution in urban areas?
• Which of the following automobile will provide least pollution problems
• The term BOD is associated with pollution arising out of
• Which system of collection of sewage is a dry system?