Thefirstfeature-lengthdocumentaryfilmtofullyinvestigatethegrowingthreattoEarth`slife-supportsystemsfromthelossofbiodiversity.Ifcurrenttrendscontinue,scientistswarnthathalformoreofallplantandanimalspeciesonEarthwillbecomeextinctwithinthenextfewdecades.CallofLifeinvestigatesthescope,thecauses,andthepredictedeffectsofthisunprecedentedlossoflife,butalsolooksdeeper,atthewaysinwhichbothcultureandpsychologyhavehelpedtocreateandperpetuatethesituation.Thefilmnotonlytellsthestoryofacrisisinnature,butalsoinhumannature,acrisismorecomplexandthreateningthananythinghumanbeingshaveeverfacedbefore.