1) Drawback of DDT as pesticide is that
a) it becomes ineffective after some time
b) it is less effective than others
c) it is not easily/rapidly degraded in nature
d) its high cost
1) Drawback of DDT as pesticide is that
a) it becomes ineffective after some time
b) it is less effective than others
c) it is not easily/rapidly degraded in nature
d) its high cost