$CO$ (Carbon Monoxide) is harmful because........

Non-ionising radiations damaging to $DNA$ are

Assertion: $A$ suspended particulate matter $(SPM)$ is an important pollutant released by diesel vehicles.
Reason: Catalytic converters greatly reduce pollution caused by automobiles.

Which of the following statements are correct regarding Eutrophication?
$I-$ Streams entering into a lake introduce nutrients like nitrogen and phosphorus,which encourage the growth of aquatic organisms.
$II-$ As the lake's fertility increases,plant and animal life flourish.
$III-$ Organic remains begin to deposit at the bottom of the lake.
$IV-$ Organic waste materials continue to accumulate in the lake.
$V -$ The lake becomes shallower and warmer.
$VI -$ Cold-water organisms are replaced by warm-water organisms.
$VII -$ Marsh plants take root in the shallows and begin to fill in the original lake basin.

Acid rain:
$(a)$ Causes necrosis
$(b)$ Converts chlorophyll-$a$ into phaeophytin
$(c)$ Responsible for formation of $PAN$

'Heat islands' are produced due to