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

Which disease is caused in children due to excessive use of nitrate fertilizers?

To which class of pesticides do $DDT$,$BHC$,aldrin,and endosulphan belong?

Catalytic converters are fitted into automobiles to reduce the emission of poisonous gases. These converters use expensive metals as catalysts,which are:

The population of birds and reptiles is declining due to $.......$.

Provide the full forms of the following abbreviations:
$(i)$ $GAIL$
$(ii)$ $BOD$