Navigating Major Programmes

How can planners and engineers design cities that are more comfortable for the people living in them? The answer to this complex question involves microclimate analysis, and Ali Katal has designed a program that could ease this process, just as more and more regions are adopting stricter guidelines around it. In this episode, Evgenia and Riccardo speak with Ali about his company, Planète GreenLeaves. The building and microclimate engineer and PhD graduate focuses on climate adaptation in cities, particularly the growing challenge of heatwaves, especially as extreme weather events become more frequent.

The conversation explores how Ali moved from academic research into entrepreneurship, developing a platform that makes advanced microclimate simulations more accessible to planners, engineers, designers, and decision-makers. His tool models heat, wind, shade, energy, and other climate factors—all in one place—to help teams understand how design decisions affect outdoor comfort. A key focus is the Universal Thermal Climate Index, or UTCI, which measures how heat stress is actually experienced by the human body in specific environments. As Ali explains, the temperature someone feels on a street can be very different from the air temperature shown on a weather app.

The innovative speakers also discuss the challenges of bringing climate modelling into real-world planning and infrastructure processes, the requirements of which are beginning to change. Toronto has introduced thermal comfort guidelines and other global cities, including Singapore and Saudi Arabia, are following suit. The episode also examines common misconceptions about heat mitigation, from tree planting to cool pavement, and why cities cannot rely on generic solutions. Ali stresses that for true transformation, cities and major project teams need better tools, clearer policies, and a stronger understanding of how design choices actually affect the people who live, work, and move through urban spaces.

Quote

“[With a different tool] it took one month, two months to get the simulation results. I can say if they were using our tool, it could be done in one day.” - Ali Katal