Excessive discharge of nitrogen and phosphorus into a lake most directly promotes:
Correct answer: C. Eutrophication and excessive algal growth
- A. Thermal stratification caused by heated effluent
- B. Desalination and reduced electrical conductivity
- C. Eutrophication and excessive algal growth
- D. Immediate removal of dissolved oxygen by filtration
Explanation
Nitrogen and phosphorus are nutrients that can stimulate excessive algal and aquatic plant growth. Their decomposition may later reduce dissolved oxygen and harm aquatic life, but filtration does not automatically remove them.
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Environmental engineering examines water supply, water quality, treatment processes, wastewater collection and treatment, solid waste management, air pollution and public health protection. It covers sedimentation, coagulation, filtration, disinfection, biological treatment and disposal methods, while distinguishing drinking-water treatment from sewage treatment and BOD from COD.
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