The 'Itai-itai' disease is caused by the poisoning of which of the following?

What is the effect of $DDT$ in birds?

What are the effects of high concentrations of $DDT$ on birds?

Identify the colloidal materials present in domestic sewage.

Given below are two statements:
Statement $I$: Electrostatic precipitator is most widely used in thermal power plants.
Statement $II$: Electrostatic precipitator in thermal power plants removes ionising radiations.
In the light of the above statements,choose the most appropriate answer from the options given below:

$A$ scrubber in the exhaust of a chemical industrial plant removes.......