The mayor of Paris, Emmanuel Grégoire, has proposed using thirty-three million square meters of rooftops for development, suggesting they could be turned into a green canopy with solar panels. This idea builds on earlier urban projects such as urban forests and shared gardens, aiming to make the city more sustainable and environmentally friendly. The proposal has sparked a conversation about how to approach urban planning, with some arguing that the city’s rooftops should be considered for their individual differences rather than as a single, uniform space. Parisian rooftops are diverse, featuring various materials and styles such as zinc and slate. These rooftops have evolved over time, shaped by history, regulations, and the preferences of property owners. While the idea of using rooftops for green spaces and renewable energy is viewed as progressive, some critics argue that treating all rooftops as a single entity may overlook their unique characteristics and historical significance. Paris is known for its mix of uniformity and diversity in rooftop architecture, unlike cities such as New York, where the skyline is a prominent feature. The discussion has emphasized the importance of understanding the existing urban landscape before making large-scale changes. Rather than applying the same policy across all rooftops, the suggestion is to consider each one's specific conditions, such as its orientation, construction type, and any existing installations. The debate reflects a broader tension between two planning approaches: one that favors unity and standardization, and another that values diversity and individuality. This discussion highlights the need for an urban policy that acknowledges the complexity and uniqueness of each part of the city, ensuring that development efforts are both effective and respectful of Paris's architectural heritage.