A person's livelihood refers to their "means of securing the necessities of life". Livelihood is defined as a set of economic activities, involving self-employment, and or wage employment by using one’s endowments (both human and material) to generate adequate resources for meeting the requirements of the self and household on a sustainable basis with dignity (“Definition of Livelihood”) . A fisherman's livelihood for example, depends on the availability and accessibility of fish. The concept of livelihood is used in the fields such as political ecology in research that focuses on sustainability and human rights. The term 'sustainable livelihood' was first used as a development concept in the early 1990s. Chambers and Conway (1991) defined a sustainable livelihood as follows: "A livelihood comprises people, their capabilities and their means of living, including food, income and assets. A livelihood is environmentally sustainable when it maintains
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