This research aims to implement green walls as thermal insulators on the east and west facades of the adjacent areas of the School of Biological Sciences at Ricardo Palma University. The growth of urban cities causes an increase in CO₂ emissions and the loss of agricultural land. The methodology applied involves evaluating the thermal behavior, analyzing the local climate, and assessing plant species for implementation. As a result, the successful implementation of green walls on the east and west facades was achieved, which has proven to effectively reduce wall heating, decrease the temperature rise in nearby spaces, and minimize reliance on artificial ventilation systems. This has led to energy and cost savings, decreased CO₂ emissions, and increased oxygen production. By implementing green walls on the east facade, there has been an increase of 60.73% in comfort hours, while on the west facade, there has been an increase of 64.28% in comfort hours. In addition, a total of 977.50 kg of CO₂ has been absorbed, resulting in 722.50 kg of purified air. In conclusion, green walls have proven to be a viable solution to the problems faced in urban cities, helping to mitigate the internal temperature of indoor spaces.