$SO_{2}$ pollution is indicated by

Photochemical smog formed in congested metropolitan cities mainly consists of

Which of the following concentrations in the atmosphere leads to acid rain?

What is $EIA$?

Phosphate pollution is primarily caused by which of the following?

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.