In every year,World Wetland Day is observed on ?
AJanuary 1st
BFebruary 2nd
COctober 2nd
DJune 1st
AJanuary 1st
BFebruary 2nd
COctober 2nd
DJune 1st
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In waste management, what are the primary objectives of sorting garbage into categories such as bio-degradable, recyclable, and non-biodegradable?