“Mechanical and industrial engineering associate professor Yi Zheng’s research group Nano Energy Laboratory published their research on ‘Oil-paper-umbrella-inspired passive radiative cooling using recycled packaging foam’ in the Journal of Materials Chemistry A and ‘Eco-friendly passive radiative cooling using recycled packaging plastics’ in Materials Today Sustainability. In both works, they studied eco-friendly passive cooling materials made of recycled packaging plastics for a greener and cleaner community. The low material cost and ease of fabrication provide a path for effective passive cooling, which requires zero external energy consumption (e.g., air conditioners), especially in less developed areas.”