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II. LITERATURE REVIEW In developing nations, particularly in rural areas, 2.5 million people rely on biomass, including fuel wood, charcoal, agricultural waste and animal dung; to fulfill their energy needs for cooking. In many nations, these resources accounts for over 90% of household energy consumption. In the absence of new policies, the number of people relying on biomass will increase to over 2.6 billion by 2015 and also to 2.7 billion by 2030 due to population growth. That is, one-third of the planet's population will still be relying on those fuels. There's evidence that, in locations where local costs have adjusted to recent high global energy costs, the shift into cleaner, more effective use of electricity for cooking has actually slowed and even reversed. Two complementary methods can improve this scenario: promoting more sustainable and efficient use of traditional biomass; and also inviting individuals to change to modern cooking fuels and technology. The proper combination is dependent on local circumstances such as per-capita incomes and also the available source of renewable biomass. Improved cook stoves have long been identified as a promising option to reduce the detrimental impacts of cooking with conventional cook stoves. Even though the expression "enhanced" owns varying importance concerning the stove's technology and performance, and is often loosely applied by promoters to very different devices in various regions, we'll continue to use it in this document for simplicity. In its latest study, "The Energy Access Situation in Developing Countries", the World Health Organization (WHO) and the United Nations Development Program (UNDP) elevated various observations regarding the ubiquity of improved cook stoves in developing countr...