Exposure to extremely high sound level, . . . . . . ,generated during a take off of a jet plane or rocket,may damage ear drums and cause permanent hearing loss.

Prolonged water logging in an agricultural field is likely to create the problem of:

Domestic waste primarily contains:

When domestic sewage mixes with river water,

Which measures can be taken to control noise pollution?
$I-$ Use of sound-absorbent materials or mufflers in industries.
$II-$ Creating horn-free zones around hospitals and schools.
$III-$ Setting permissible sound levels for firecrackers and loud speakers.
$IV-$ Restricting the use of loudspeakers after a certain time.

$A$ disease caused by eating fish contaminated by industrial waste containing mercury compounds is known as