Fossil fuels, which still dominate global energy consumption, pose significant environmental and health risks due to their greenhouse gas emissions. To combat these negative effects, researchers are exploring hydrogen, particularly HHO gas, as an alternative fuel source. HHO gas, derived from water-splitting methods like electrolysis, boasts advantages such as high flammability, fast burning rate, and zero carbon emissions, making it a promising solution for various applications. Studies show that the dry cell electrolysis technique is more efficient and cost-effective for HHO gas production, offering a reliable and easy-to-maintain method. By utilizing different electrolytes like KOH and NaOH, researchers have been able to enhance the production of HHO gas, leading to increased efficiency and reduced emissions in engines. Ongoing research focuses on optimizing parameters such as current, voltage, electrolyte concentration, and catalysts to further improve the production efficiency of HHO gas. These advancements not only address the energy shortage problem but also contribute to environmental preservation and reduced pollution, making hydrogen a viable alternative energy source for the future.