We propose a Public–Private Climate Action Model built around an Urban Climate Sprint, a structured, repeatable 8-step process that enables the city, local businesses, property owners, and GBG-service providers to jointly identify climate-stress hotspots, run rapid 30–60-day pilots that aim at mitigating the heat island, evaluate their impact, and convert successful
pilots into permanent green–blue–grey (GBG) solutions. The model defines clear roles for each stakeholder, establishes transparent cooperation procedures, and integrates data-driven decision-making, enabling Warsaw or any city to systematically scale nature-based and cooling solutions across priority areas while sharing costs, responsibilities, and longterm benefits between public and private actors. Mobile hyperlocal mapping and impact verification will be carried out by IdealSens, using on-site sensors and environmental data collection to quantify the benefits of each intervention. In parallel, the TalTech team will perform advanced heat modelling and oversee the operation of the GBG mobile infrastructure, ensuring that each pilot is scientifically validated, technically sound, and optimized for measurable urban cooling and comfort improvement.
