Abhijit Deb Roy, Praveen Kumar, Debashish Jena and Shrawan Kumar Trivedi
In the long-term transition to a truly sustainable global energy system, marketing of liquefied petroleum gas (LPG) is increasingly being seen as a "bridging fuel" alongside natural gas. Governments across the world are urging people to utilise LPG as their major source of cooking fuel. This has a major effect on the environment and human health. By minimising the pollution in the kitchen caused by the burning of traditional fuels like firewood, coal, cow dung, and kerosene, it also empowers women. LPG availability and cost were major issues in various nations, and these issues received special attention from the respective governments throughout the world as strategic marketing decisions in the form of subsidies, loans, enhanced supply chains, promotion, regulation, and a focus on health and development. The present global endeavour to reduce indoor pollution centres on the long-term sustainable use of LPG and its adoption as the principal cooking fuel. To analyse the existing research on the topic of “Sustainable LPG”, a thorough literature review on the subject is performed in this work by using a machine learning approach known as "Topic Modelling" with LDA (Latent Dirichlet Allocation). By this investigation, we could zero in on a set of topics that have generated research publications in international journals. In summary, emerging topics pertain to concern for climate change, reduction in pollution, use and adoption of LPG as fuel, impact of LPG usage, various government schemes for promotion of LPG usage etc.