The major source of noise pollution,worldwide,is due to:

Which of the following non-ionizing radiations causes damage to $DNA$?

$A$: $Euro-II$ norms were framed to reduce the content of $CO$ and aromatic compounds from fuels.
$R$: These compounds lead to reduced visibility and carboxyhemoglobin formation.

Exposure to which sound level for a short period can damage the eardrum?

Which of the following is a secondary pollutant?

Thermal pollution is more prevalent near