TechnologyThe ProfessorIntermediate
Passive Urban Cooling, a free technology course on Tomo

Passive Urban Cooling

Like Duolingo, but for Passive Urban Cooling. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.

For the part of you with thirty open tabs that never became anything.

21 levels across 3 sections, about 42 minutes end to end, roughly 8 days at five minutes a day. It moves through Immediate Interventions at Street Level, Geometry and Building Envelopes, and Macro Airflow and Systems Integration. It assumes you already know the basics.

21 bite-size levelsAbout 5 minutes each

Free forever · No credit card · iPhone & Android

Zephyr the Zebra, the guide who teaches the Passive Urban Cooling course
Passive Urban Cooling
with Zephyr the Zebra
21
Levels
3
Sections
5
Min/day
What you'll learn

Key ideas in Passive Urban Cooling

  • Solar reflectance bounces direct incoming solar rays away before heating occurs
  • Thermal emittance radiates absorbed heat outward rather than storing it
  • A high Solar Reflectance Index requires both high reflectance and high emittance
  • Reflected shortwave radiation hits human bodies directly, raising mean radiant temperature
  • Cool pavements decrease surface heat while potentially increasing human thermal discomfort
  • High-albedo pavements require vertical shade to prevent lateral and upward radiative loading
  • Permeable pavements cool via latent heat flux driven by evaporating internal moisture
  • Dry porous voids trap stagnant air and lose their cooling advantage over standard asphalt
  • Subterranean moisture or storm storage is required to sustain pavement evaporative cooling
  • Diffuse reflective coatings scatter light into adjacent building facades and street-level pedestrians
  • Retroreflective treatments bounce solar rays back along the incident path toward the sky
  • Narrow street canyons trap scattered diffuse radiation through mutual building inter-reflections
  • Continuous unshaded asphalt parking lots create massive localized thermal hot spots
  • Transit boarding zones and rights-of-way concentrate vulnerable pedestrians on dark pavement
  • Low-emissivity rooftops reduce indoor air conditioning demand but have negligible direct ground-level pedestrian impact
  • High LAI blocks daytime solar radiation but traps outgoing longwave radiation at night.
Why not just Google it

You've tried the other tabs

Wikipedia

Thirty open tabs. Four facts you actually kept.

YouTube

You watched. You nodded. By Sunday it was gone.

ChatGPT

One answer, then back to scrolling.

Online courses

Eight weeks. You meant to finish. You didn't.

Tomo gives Passive Urban Cooling the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.

Try a question

Here's what playing it feels like

A real question from this course. Take your best guess.

Balancing Surface Heat and Human Comfort

What role does thermal emittance play when a street surface absorbs sunlight?

Get it right to open this lesson and 20 more in the app.

Course map

Where Passive Urban Cooling takes you

Transform sweltering streetscapes into resilient, comfortable microclimates without relying on mechanical air conditioning. Master the physics of urban canyon geometry, high-albedo materials, tree canopy dynamics, and natural ventilation corridors.

  1. 1

    Immediate Interventions at Street Level

    • Tuning Street Surfaces and Albedo
    • Deploying Urban Tree Canopy
  2. 2

    Geometry and Building Envelopes

    • Shaping the Urban Canyon
    • Designing Passive Building Skins
  3. 3

    Macro Airflow and Systems Integration

    • Channeling Urban Wind Corridors
    • Integrating Blue Infrastructure
    • Diagnosing and Modeling Microclimates

3 sections · 7 units · 21 levels. Built to play, not to enroll.

How it's taught

You pick the voice

This course
The Professor

Passive Urban Cooling is taught in the The Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.

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Start free

Start Passive Urban Cooling today.

Download Tomo, search Passive Urban Cooling, and play your first lesson in under a minute.