Ethanol has attracted the attention of many researchers due to its industrial application in biomedical and transportation fields. Nevertheless, it causes many negative impacts, such as causing drunk driving, which sometimes causes accidents. Hence, many researchers have developed highly responsive ethanol gas sensors that focus on materials. One of the unique research findings is the utilization of natural resources of yarosite minerals in fabricating ethanol gas sensors. In practice, these yarosite minerals can be extracted to become F2O3 precursors, and they can be synthesized by some researchers to become LaFeO3 due to their responsive properties to ethanol gas. In addition, to improve their response to the detection of ethanol gas, various doping (single-doping and double-doping) were added. These synthesis processes were conducted using the co-precipitation method. This method produces small grain sizes, which is an advantage for gas sensor applications to enhance performance. Then, it is anticipated that the utilization of natural resources of yarosite minerals can reduce the fabrication cost of ethanol gas sensors. Hence, the findings will tremendously influence the development of gas sensors and can minimize any negative impacts caused by ethanol in each sector.