$BOD$ is a measure of what?

What is an algal bloom?

What was the cause of the 'Yusho' disease which occurred in $1968$ due to a leak in a canning factory?

All of the following are the ill effects of particulate pollutants on human health $EXCEPT$ . . . . . .

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.

Choose the incorrect sentence regarding $BOD$.