True or False: Eutrophication is caused by excessive nitrogen and phosphorus in water bodies.
- True
- False
Answer: True
Eutrophication occurs when nutrient runoff (from fertilizers, sewage) causes algal blooms. Depleted oxygen levels from decomposing algae kill aquatic life. It's a major water pollution issue addressed in environmental policies. [[NCERT Biology Class 12, CPCB Reports]]