Which of the following is an alarming effect of thermal pollution in water bodies?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. The amount of dissolved oxygen decreased significantly.
The most alarming effect of thermal pollution in water bodies is that the amount of dissolved oxygen decreases significantly. When the temperature of water rises due to industrial discharge or other human activities, its ability to hold oxygen reduces. Low oxygen levels make it difficult for aquatic organisms such as fish and plants to survive, leading to loss of biodiversity. Additionally, warmer water speeds up the metabolic rates of aquatic life, further increasing oxygen demand. This imbalance disrupts the aquatic ecosystem, causes fish kills, and promotes the growth of harmful microorganisms, making it one of the most serious consequences of thermal pollution.