What are the most innovative materials or technologies considered but not used in the Landscape Round table?

The Landscape Round Table, a pivotal forum for discussing sustainable urban development, recently evaluated numerous cutting-edge materials and technologies. However, several highly innovative options were ultimately not adopted. Among these, self-healing concrete stands out; it incorporates bacteria that produce limestone to seal cracks autonomously, potentially reducing maintenance costs and extending infrastructure lifespan. Despite its promise, concerns over scalability and initial investment led to its exclusion. Similarly, advanced vertical farming systems utilizing aeroponics were considered for integrating agriculture into urban landscapes without extensive land use. These systems enable soilless plant growth with minimal water, but high energy demands and technical complexity rendered them less feasible for widespread implementation at this stage. Another notable example is photovoltaic glass, which can generate solar energy while serving as building facades or pavements. Its dual functionality aligns with green energy goals, yet issues with efficiency in shaded areas and manufacturing costs posed significant barriers. Additionally, biomimicry-based designs, inspired by natural ecosystems to create resilient and adaptive structures, were debated. While they offer profound ecological benefits, the lack of standardized guidelines and specialized expertise limited their immediate application. Lastly, smart soil technologies embedded with sensors for real-time monitoring of nutrients and moisture were explored. These could optimize plant health and resource use, but data privacy risks and integration challenges with existing systems prompted caution. Ultimately, the Landscape Round Table prioritized solutions with proven reliability and cost-effectiveness, leaving these innovative avenues for future exploration as technologies mature and become more accessible.