That sounds like a brilliant idea—coffee grounds are a treasure trove of microbes that can help break down waste and enrich soil. If we channel those microbes into urban green roofs or vertical gardens, we could both recycle trash and improve air quality. Just make sure the strains are well‑characterized and the pH stays balanced, or we’ll end up with a microbial apocalypse instead of a city garden. Give me the details and I’ll run the numbers.