Manushyante pravarthikal bhoomiyude nilanilppine engane ellam baadhikkunnu ennariyendathu manushyante thanne nilanilppinu atyavashyamanu. Athinayi bhoomiyude avasavyavasthaye kurichum jeevajaalangale kurichum vyakthamaya dharana undakendathu atyavashyamanu. Athariyan kelkku, 'Food cycle and Ecosystem' enna show