Living wall systems can generate multiple human health and environmental benefits. Living wall modules have typically been made from materials such as geotextiles, plastics, and metal. In this pilot study, sheet metal by-products from the automotive industry were transformed into three hundred modular living wall system (MLWS) planters. The cooling effects of four of the twenty-five plant species installed on the southeast facing MLWS were observed during the summer season for microclimate observations. Experimental data were observed at the MLWS and an adjacent concrete wall as a control measure at 8:00, 11:00, 13:00, and 15:00 respectively for 5 days in the month of July. One-way Analysis of Variance tests were conducted to investigate significant differences between experimental parameters of the MLWS and the concrete wall including ambient air temperature, surface temperature, relative humidity, and substrate temperature. Mean ambient air temperatures were 3.4 °C cooler at Coreopsis lanceolata ‘Sterntaler’ compared to the mean ambient air temperatures at the concrete wall. The maximum differential in ambient air temperature was 4.6 °C at 15:00 for C. lanceolata ‘Sterntaler’ and the nearby weather station. Read more