The growing global population and increasing demand for oil highlight the need for enhanced oil production. In this context, various Enhanced Oil Recovery (EOR) methods have been developed, considering reservoir characteristics, available materials, fluids, and economic factors. However, traditional EOR techniques have led to significant environmental challenges, including pollutant emissions, greenhouse gas release, and ecological degradation. As a result, green EOR methods aimed at minimizing environmental impacts have gained attention. These methods include the injection of organic materials, microbes, solar systems, and nanotechnology. Each method offers distinct advantages and drawbacks, with their applicability depending on the specific reservoir conditions and local factors. Despite significant progress in this field, comprehensive comparative studies on the effects and challenges of these green EOR techniques remain limited. Further research is essential to assess their effectiveness, sustainability, and potential to reduce the environmental footprint of oil recovery.