The overall objective is, to study the effects of environmental degradation on human security withrnspecial emphasis on food, economic, health, social and personal security in Erob Wereda. Tornachieve this objective, the study employed fundamentally qualitative with limited quantitativernmethods to collect relevant data. It used both primary and secondary sources of data. Thernprimary data was collected from 55 participants via in-depth informant interview, focus grouprndiscussants representing the grass root societies such as smallholder farmers, local residents andrnother key informants selected based on purposeful sampling. Secondary data was obtainedrnthrough critical review and analysis of related literatures and appropriate documents. Thernmethods were In-depth Informants Interview (III), Focus Group Discussions (FGDs), KeyrnInformants Interview (KII) and personal observations and employed qualitative analysis withrnlimited quantitative analysis. Based on the study, the causes of environmental degradation inrnErob Wereda are several intertwined and conglomeration factors. The core finding of the studyrndisplayed that, environmental degradation has actual, unprecedented and multitudinous effect onrnhuman security which undermine food, economic, health, social and personal security of farmersrnand environmental dependent peoples of Erob Wereda. Each household is prevalently facedrninter-household conflict, food shortage, economic deterioration and misery due to declining ofrntheir agricultural, cattle and honey production from time to time. Moreover, diminishing in land,rnbushes/forest and water resources has significant impact on weakening of socio-economicrnvalues; undermine means of production and livelihood and may extend as major threat to thernfuture generation. The study also proclaimed that single environmental problem can have manyrnthreats starting from the household to the national and international level. Thus, the resultsrnindicate that extensive environmental degradation poses multiple challenges to human security.rnSo, to solve repercussion of environmental risks, environmental issues should be critically dealtrnwith. The study also revealed that the adverse effect of environmental degradation in ErobrnWereda is exodus migration which threat personal security and social disintegration. Generally,rnresource degradation is serious problem and poses myriad challenge in the study area. Thernenvironment in the area has become more fragile than ever resulting decline in agriculturalrnproduction and productivity, frequent food deficiency, health problems, drought and famines thatrnseverely impair human security. Finally, the study set-forth that there is interactive and viciousrncausality-effect correlation between environmental degradation and human security.rnKey words; Environment, Environmental Degradation, Human security.