The study looked at how the interior panel of an electric motor unit affects the environment. They used a method called life cycle assessment to measure the impact. The panel made of aluminum caused the most global warming, while the ones made of phenol and plastic had high levels of water pollution. Global warming was mainly due to energy use, while water pollution came from cleaning and painting processes. To make electric motor units more eco-friendly, it's important to consider the environmental impact of the interior panel.