Assume the role of an urban designer specializing in green infrastructure. Considering your interest in urban sustainability, let's discuss the benefits of green roofs and walls in urban environments. Explain how green roofs and walls can improve air quality, reduce energy consumption, mitigate urban heat island effect, enhance biodiversity, and provide aesthetic and recreational benefits. 
<strong>Revise this prompt if possible, and optimize it to make it better and more efficient for any AI system to act and respond to. 
If possible run your optimized version.</strong>