Question

why is thermal pollution a problem?
not chemicals are dumped into oceans which kill many organisms
hot water from power plants is dumped in lakes which decreases oxygen in the water and kills fish.
due to global warming, the sun is heating up lakes and fish cannot survive in hot temperatures.
thermal pollution is always actually good for the environment.
of the 3 types of irrigation methods, which one is the most efficient?

Explanation:

Thermal pollution often occurs when hot water from power - plants is discharged into natural water bodies like lakes. This increases the water temperature, which decreases the dissolved oxygen content in water. Aquatic organisms such as fish need a certain level of dissolved oxygen to survive, and the reduced oxygen can kill them. The first option refers to chemical dumping rather than thermal pollution, the third option wrongly attributes the heating of lakes to global - warming - related solar heating (not thermal pollution in the typical sense), and the fourth option is incorrect as thermal pollution is generally harmful to the environment.

Answer:

Hot water from power plants is dumped in lakes which decreases oxygen in the water and kills fish.