Born at UCL · Est. 2026

Making invisible smoke visible.

A behavioural-science and textile-led intervention helping rural Nepali households adopt clean cooking, and turning the soot they capture into a circular design material.

Origin
London Nudgeathon '26

Oxford, Cambridge, LSE, UCL and Warwick.

Recognition
PwC Strategy& · BIT · VML Health · Dectech · Gorilla Experiment Builder · BeSci.io · Think.Test.Do
Clean cotton. Day one.
CleanSooted
Restore
UCL Psychology & Language SciencesSave the Children · Nepal Climate ProgrammeLondon Nudgeathon 2026 · 2nd place
01 · The problem

The problem isn't the stove.

Most families given a clean cookstove keep lighting the old open fire too. Researchers call it stove stacking. Grants arrive, hardware is distributed, and the smoke keeps rising.

The shortfall is behavioural, not technological. Which means it can be redesigned.

69%

of households stop using the improved cookstove entirely.

Lohani et al., 2025

78%

still rely on traditional open-fire cooking indoors.

Clean Cooking Alliance

~24k

premature deaths a year in Nepal from indoor air pollution.

Giri et al., 2025

02 · The intervention

One cotton cloth.

A clean white cotton square by the stove stays white. Over the open fire, it turns grey with soot - and the change is visible to everyone. The smoke is no longer something you only cough from; you can see it caught in the cloth with your own eyes. That is the core essence of the intervention: the pollution becomes visible. No words, no literacy needed. Families take it home and hang it where they eat, a daily, visible reminder of what they have been breathing.

It is the smallest possible object doing the largest possible cognitive job: making an invisible harm visible enough to act on.

  • Costs pennies, distributed with any existing cookstove programme.
  • Culturally legible; sits alongside domestic textiles already in the home.
  • Produces a physical, measurable signal researchers can score.
Cloth A · clean kitchen
Cloth B · one month over an open fire
03 · Circular material

From invisible smoke, to ink.

The soot the cloth captures is, chemically, close to carbon black, the same pigment base used in ordinary printing ink. Captured, purified to remove heavy metals and carcinogens, and ground fine, it can be reclaimed into ink for textile print and artwork.

A research direction I am actively developing, inspired by the MIT Media Lab research behind Graviky Labs and their AIR-INK work. I do not claim a finished product; I claim a serious brief.

Reference: Graviky Labs, AIR-INK - MIT Media Lab spin-off.

Status · pilot design phase
1234CaptureCLOTH BY THE STOVEPurifyREMOVE HEAVY METALSPigmentGROUND CARBON BLACKInkTEXTILE PRINT, ART
04 · The partnership

A material, a story, a window.

This is not a donation. It is a design-and-material partnership with a circular story a house can own, from a family kitchen in the hills of Nepal to a printed cloth in a shop window on your street.

Working idea: commission a Nepali artist to work in the reclaimed soot-ink on a theme drawn from prayer flags, staged as a single shop-window installation. One commission. One measured pilot.

Textile & craft partner

Cotton sourcing, refining the cloth itself, supplying the pilot kits distributed with cookstove programmes on the ground.

  • Cotton spec & sourcing
  • Cloth manufacture at pilot scale
  • Co-branded kit design

Design & culture partner

Design research, commissioning the Nepali artist, funding a measured pilot and the shop-window commission.

  • Artist commission
  • Window / retail moment
  • Impact reporting
Recognition

2nd place, London Nudgeathon 2026.

Judge Panel from PwC Strategy& · BIT · VML Health · Dectech · Gorilla Experiment Builder · BeSci.io · Think.Test.Do

UCLSave the Children · Nepal Climate Programme2nd place, London Nudgeathon 2026
05 · About & contact

Start a conversation.

Founded by Guglielmo Catalano (UCL Psychology & Language Sciences), The White Lung-ta™ bridges behavioural science, sustainable fashion, and impact investing. I am currently seeking one exclusive textile manufacturing partner and one strategic design partner to launch our first measured field pilot in Nepal in late 2026.