Which of the following is least likely to be an effect of noise pollution on humans?
decreased cortisol levels
decreased productivity
increased risk of heart disease
loss of sleep
short-term hearing loss

Option (1)

Explanation:

Noise pollution refers to the condition where there occurs increase in the volume of sound. It directly affects the physiological health of a person. It is mainly caused by the use of heavy machineries, vehicles, high music system.

The effects of noise pollution is very significant. It is responsible for the loss of sleep, short term hearing loss, heart diseases also gets increased because of sound pollution. A person losses his/her focus, as a result of which the productivity of a person decreases.

According to the research, it has also been found out that the exposure to high sound pollution leads to the increase in the cortisol level.

Thus, the correct answer from the given option is option (1).