1.1. Background and Context
Universal access to affordable and clean energy access by 2030 is one of the goals defined in the United Nations’ Sustainable Development Goals (Goal 7). To enable energy access, researchers have proposed several energy-related solutions to meet basic human needs, such as electricity, heating, cooling, clean cooking, etc., and in despite their work, billions of people are still deprived of even primary energy services
[1][2][3][4]. Hence, universal energy access is considered as one of the most crucial targets among all Sustainable Development Goals.
Carrillo
[4] identified that the issue of energy scarcity and energy security are especially critical for rural populations of developing countries. Also, Muhumuza et al.
[5] recognised that provision of modern energy services remains a key problem and challenge for rural populations.
Research into energy security in the southern part of the world (especially South East Asia and Africa) has a long tradition, most of which focuses on electricity access in rural regions
[6][7][8]. However, from the energy research point of view, Central Asia has received less attention than other Asian regions. Energy scarcity in Central Asia exists because of multiple dimensions including the geographical context, nature, environmental influence, and international factors
[9].
Geographically, Central Asia is facing completely different energy situations as compared to the industrialised countries of the global north as well as the developing global south
[10]. Central Asia is situated between the Caspian Sea in the west and China in the east and between Afghanistan in the south and Russia in the north. The region consists of the five different former Soviet republics called Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan. The basic statistics and demographics of the Central Asian countries are listed in , which helps to characterise the Central Asian republics from the socio-economic point of view.
Table 1. Key socio-economic indicators of the Central Asian countries in 2018 (data according to
[11][12][13][14][15]).
Several geographical and geopolitical factors are unfavourable for economic development in Central Asia
[16][17]. The Central Asian region is geographically distant from the foremost centres of world economic activity. Furthermore, all the Central Asian countries are landlocked with minimal transportation connections inside and outside their borders
[18][19][20]. The limited connectivity between Central Asia and the outside world remains a major hindrance to expanding the trading and commercial sectors
[16][21]. Hence, because of the limited economic activity, most of the Central Asian population make their living in the agriculture and forestry sectors
[22][23].
Central Asia is a vast region (~4 million km
2 and has a total population of ~70 million), with a diverse range of geographical features and climates
[24]. This includes high-altitude regions, a long-range of snowy mountains, sizeable and warm deserts, and plentiful water resources including two inland seas. Deserts mainly occupy the majority of the land area of Kazakhstan, Uzbekistan, and Turkmenistan. The major deserts in Kazakhstan (Kyzyl Kum and Taklamakan) have extreme temperature ranges with seasonal drought. The strong winds are responsible for dust storms in Kazakhstan which result in agricultural land erosion, and the same applies to the deserts in Turkmenistan and Uzbekistan
[25][26][27].
On the other hand, water resources are an essential feature of Kyrgyzstan and Tajikistan. Both countries have extensive mountainous ranges including the Pamir mountain range (Tajikistan) and the Tien Shan mountain range (Kyrgyzstan). These elevated mountainous ranges (up to 7000 m) are responsible for the high-altitude characteristic and the cold climatic zone of these countries
[28]. The major part of the mountain ranges is permanently covered with snow and glaciers. The glaciers are the origin of natural water resources which flow in different waterways (i.e., rivers, irrigation channels, water streams, etc.) in Kyrgyzstan and Tajikistan
[15]. Downstream countries (Uzbekistan and Turkmenistan) are supplied with river water that is used for irrigation of agricultural fields from upstream countries (Tajikistan and Kyrgyzstan)
[29][30].
Central Asia’s climate is highly variable across the five countries and represents diverse topographical conditions. For instance, Kyrgyzstan has a cold climate and the majority of the land is covered with snow during the wintertime. However, Tajikistan’s climate is mainly subtropical and semi-arid, with half of the country’s elevations above 3000 m, while 80% of Turkmenistan area is flat desert
[31]. Because of the mountain ranges in the east and southeast, winters are harsh and prolonged with a temperature range of −25 °C to 10 °C with a snow-covered landscape for more than half of the year. The summers across the Central Asian regions are generally warm to hot, with mean temperatures ranging from 10 °C to 40 °C
[32].
1.2. A Framework of Energy Resources
Besides its unique geographical and climatic circumstances, Central Asia is endowed with abundant and diverse energy resources, such as natural gas, oil, raw coal, and plentiful untapped renewable energy resources, including hydro, solar, wind, and biomass energy
[9][10]. indicates the available natural energy resources by country.
Figure 1. Available energy resources by country (bt = billion tons, tcm = trillion cubic meters, bb = billion barrels, MW = megawatts) (data according to
[9][10]).
Kazakhstan is the largest and wealthiest country within the Central Asian region and possesses large oil and coal reserves. Uzbekistan is a significant fossil fuel producer in Central Asia, while Turkmenistan is also a significant energy player in Central Asia, as it has significant natural gas resources and an established thermal power sector
[33]. In contrast, Kyrgyzstan and Tajikistan are the smallest and most impoverished countries in the region; however, the very large hydropower resource is concentrated at their disposal. The substantial deposits of fossil fuels are key resources to supply primary energy in Kazakhstan, Turkmenistan, and Uzbekistan. represents the total primary energy supply by various sources in the five countries over the last 25 years
[34].
Figure 2. Total Primary Energy Supply in Central Asia by various sources (reproduced from
[34], IEA (2019)).
It can be observed from that fossil fuel-based energy supply is a common practice for these countries for the last 25 years. In contrast, Tajikistan and Kyrgyzstan are underprivileged in terms of fossil fuel reservations but fulfil their energy supply mainly from concentrated hydropower. It can be observed from that besides hydropower, other renewable energy (RE) sources are not utilised for energy generation.
Despite its access to diverse energy resources (fossil and non-fossil), Central Asia is facing a complex energy security crisis
[10]. The provision of modern, affordable, and reliable energy services remains a challenge, especially in rural Central Asian regions. Rural communities in these regions cannot meet their basic energy needs due to the poor infrastructure of the energy supply systems and geographical isolation from the major energy production centres.
The absence of suitable energy services leads people to use available natural resources to meet their basic energy needs. This heavy reliance on natural resources means considerable exposure to indoor and outdoor air pollution. Mountain societies in Central Asia are highly vulnerable to the impacts of climate change
[35][36][37][38]. For example, Reyer
[39] investigated the ways that Central Asia experiences climate change by presenting various sectors such as energy, water, food, and heat, and suggested that all of these factors will be severely affected by climate change.
1.3. Objective and Methodology
After independence in 1991, Turkmenistan and Uzbekistan have been on the track towards a speedy recovery in terms of infrastructural development and access to energy services because of their huge deployment of fossil-fuel resources. The export of the fossil-fuels to neighbouring countries (e.g., exports of natural gas to China and coal to Kyrgyzstan and Tajikistan) yields financial growth and stability to the mentioned Central Asian countries
[16][33][40]. They then invest these capital inflows in their housing sectors as well as infrastructure development, especially in urban areas. Also, there are very limited information available related to the energy situation in Turkmenistan and Uzbekistan. Hence, this research article focuses on the remaining three countries (Kazakhstan, Kyrgyzstan, and Tajikistan) of Central Asia and investigates their rural energy supplies.
The available scientific information mostly focused on the effects of climate change, the water-energy nexus, and environmental issues in the context of Central Asia
[41][42][43][44][45]. However, there is a gap in the literature regarding the distribution of energy services among urban and rural areas in Central Asia. Hence, the research described in this paper aims to perform a comparative analysis and assessment of the current status-quo of energy situation and challenges for selected case study countries of Kazakhstan, Kyrgyzstan, and Tajikistan.
displays the methodological approach of the presented article.
Figure 3. Graphical representation of the concept and structure of the presented review article.