Mnemonic series: 4/n Biosphere reserves part of UNESCO "Man and Biosphere" program : "No GS GK iN SAPPNA" (Sappna means Dream in English)

Mnemonic series: 4/n Biosphere reserves part of UNESCO "Man and Biosphere" program : "No GS GK iN SAPPNA" (Sappna means Dream in English)