The innovative ‘hemp substrate panel’ as a component of green roofs, is a sustainable greening system for cities to overcome challenges such as heat islands, sealed surfaces and CO₂ pollution. Hemp stores CO₂, binds water and improves building cooling, ideal for ‘sponge cities’. With its low weight and wide range of applications, the solution is suitable for new buildings and renovations, increases the efficiency of photovoltaic systems and promotes sustainable construction. The aim: to make cities climate-resilient and improve quality of life.