Speaking at the UN: From Local Smog to Global Climate Policy

The Long Road to the Podium

Growing up in Chongqing, I wore dust masks daily. The fog was not poetic — it was particulate matter settling into lungs. Years later, meeting Uncle Deng in a Pingxiang coal mine, his lungs scarred by pneumoconiosis, taught me that air pollution is not an abstract statistic. It is a matter of life and death.

My research on atmospheric stability and pollution corridors in Shanghai street canyons started as a technical question: does the atmosphere trap or dilute pollutants? But as the data accumulated, I realized the answer had policy implications. Stable atmospheric conditions can increase residential exposure by 30–50%. Cities need stability-specific ventilation strategies, not just emission caps.

At SB62, I argued for exactly that. The UN conference was a whirlwind of formal sessions, side events, and corridor conversations with youth delegates from Kenya, India, Brazil, and Germany. What struck me most was how local each person’s climate story was — and how universal the structural barriers remain.

What I Learned

The most important lesson was methodological humility. Policymakers do not need more beautiful CFD contours; they need actionable, validated recommendations tied to real urban budgets. By combining simulation, physical experiment, and LLM-driven tools, I learned that robust environmental science requires triangulation — and that advocacy without rigor is just noise.

My next step is a field campaign using portable sensors and drone platforms to capture the mesoscale gap between fixed monitoring stations and building-scale models. The UN stage was not a destination — it was a checkpoint.