Question

80. Which of the following factors
leads to Eutrophication
O Excessive use of fertilizers
O
Increase of plant nutrients
O Both (a) and (b)
O None of the above​

Answer 1

Explanation:

excessive use of fertilizer

Answer 2

The correct answer is OPTION 3: Both (a) and (b).

• Eutrophication is the rise in nutrient concentration in an environment, which is usually unfavourable.
• Increased nutrient enrichment can be caused by both point and non-point pollution sources referred to as "diffusive pollution sources".
• Pollution is caused by toxins entering a river from a single recognised source, such as a fixed location or facility.
• Examples include sewage treatment plants, industrial plants, and fish farms.
• Pollution comes from a variety of places, including human activities, and there is no one site of discharge or entry into receiving watercourses.
• Two examples are the leaching of nitrogen molecules from fertilised agricultural soils and losses owing to air deposition.