Where did the epidemic bone-softening disease 'Itai-Itai' occur first?

What is the warning concentration of lead $(Pb)$ in the blood?

The deposition of pesticides in fatty tissue of the organisms is called . . . . . .

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

Given below are two statements:
Statement $I:$ In a scrubber,the exhaust from the thermal plant is passed through a spray of water or lime to remove gases like $SO_2$.
Statement $II:$ Particulate matter $(PM\,2.5)$ cannot be removed by a scrubber but can be removed by an electrostatic precipitator.
In the light of the above statements,choose the most appropriate answer from the options given below:

$dB$ is a standard abbreviation used for the quantitative expression of