A significant advancement in Earth System Modeling (ESM) has been announced with the development of a new 3D urban building community model. Published on ESS Open Archive, this model aims to provide a more detailed and accurate representation of urban environments within global climate simulations. Traditionally, ESMs have faced challenges in accurately incorporating the complex influences of urban areas on climate. This new model addresses these limitations by offering a comprehensive 3D view of urban structures, which is crucial for understanding processes like urban heat islands, atmospheric composition, and energy exchange. The development is particularly noteworthy as it moves beyond 2D representations, allowing for a more nuanced analysis of how urban morphology and density impact local and potentially global climate patterns. The research suggests that incorporating such detailed 3D urban data can lead to more precise climate predictions, aiding in the development of effective climate adaptation and mitigation strategies. This new model's formulation is expected to enhance our understanding of urbanization's multifaceted effects on the Earth system. It also holds promise for improving disaster management, infrastructure planning, and the overall sustainability of urban development. The availability of such detailed urban data is critical for scientific research and for informing policy decisions related to climate change and sustainable development goals. The ESS Open Archive serves as a platform for early dissemination of such foundational research, allowing the scientific community to engage with and build upon these advancements.