This document outlines steps to simulate an urban environment with and without a community garden in SketchUp, Unity, and ArcGIS/ArcScene to analyze pollution levels. It involves building the city and garden in SketchUp, simulating pollution particles in Unity, running simulations in environments with and without the garden, analyzing results in ArcGIS using buffer zones, visualizing analysis in 3D in ArcScene, and creating a 3D analysis model in SketchUp.