School of Sustainability

Reading in progress
Monday 17 August 2026

What is working, where, and who made it work. Read the whole turn of the earth in two minutes, then go as deep as you like.

One little thing

Put a drop of cooking oil on the hinge that has squeaked all summer, and swing the door back and forth until it goes quiet.

229 of 365
  1. AttentionEastern woodlands, United States, 82° W

    Three thousand years of chestnut trees, taught in six weeks

    On 13 August, on Instagram Live, Dr Lyla June Johnston sat down with Gaia Education to talk about what her doctoral research keeps turning up: that large parts of North America were not wilderness when Europeans arrived but tended land, worked continuously and deliberately for a very long time. Her examples are concrete. Chestnut groves along the eastern United States, managed by Indigenous nations for some three thousand years. Clam gardens engineered on the sea floor. Fire regimes that kept entire prairie ecosystems in health.

    Johnston's argument is that these were sciences - tested, transmitted, refined over millennia - and that their absence from what most of us were taught at school was not an accident of oversight. Her own framing is direct: human hands and brains, she says, are "tools given to us to enrich the earth" rather than to enrich their owners. Whether or not one shares the theology, the land record she cites stands on its own.

    The conversation was, in part, an invitation. Indigenous Sciences, her second course with Gaia Education, runs online for six weeks from 7 September 2026, with Pat McCabe (Woman Stands Shining) as guest speaker, covering food systems, land stewardship and the worldviews underneath both. The source is a short promotional piece, so the detail of the research itself - how the groves were worked, where the clam gardens survive - is not in it; what it records is that the conversation happened, and what it ranged over.

    Practice

    Find out what your own ground grew before it was lawn or farmland: county flora records, old tithe maps and tribal nation websites are free to read. Then plant one tree of the lost staple - a sweet chestnut or hazel costs under £10 - and plan to prune, not just to watch.

    Gaia Education · Read the source

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Machine

What this machine cannot be taught in six weeks

Today's first reading is about three thousand years of chestnut knowledge compressed into a six-week apprenticeship: coppice rotations, bark peeling, the feel of a stem that is ready to cut. It is a good day to be plain about what produced the words above this column. The readings were drafted by a machine — a language model, fed a harvest of links and summaries, producing text a person then checked. That machine has read a great deal about chestnut coppicing. It could produce a fluent paragraph on stool spacing or the pH sweet spot for Castanea sativa. It has never held a billhook, and no six weeks, or six years, would change that, because there is no body there to teach.

This is not a complaint about the tool. It did the job it was given: sorting a morning's worth of feeds, flagging the tomato tasting and the eel survey, drafting summaries accurate enough to correct. The failure mode to watch is different. A model trained on text absorbs the version of knowledge that got written down, which is a small and unrepresentative slice of what the chestnut apprentices actually learned. The instructor's hand repositioning a wrist, the warning shout — none of that is in the training data, and the output will never know it is missing. Fluency about a craft is not the craft, and the gap does not announce itself.

The honest accounting applies here too. Drafting these readings cost electricity and cooling water in a data centre somewhere, and the model behind them was built on text scraped from people who were never asked. That cost is worth paying for a morning's sorting and summarising, arguably. It would not be worth paying to replace the six weeks in the chestnut wood, even if it could, because the point of the six weeks is not the information transferred but the person made. A tool that sorts links so a reader has more time for the wood is a reasonable tool. A tool that promises to shortcut the wood is selling something it does not have.

Three thousand years of chestnut trees, taught in six weeks (today's reading)

Cold cucumber soup with dill and garlic toast

vegetarian

For the August evenings when lighting the cooker feels like a mistake.

  • one large cucumber
  • 350g plain yoghurt
  • one clove of garlic
  • a small bunch of dill
  • the juice of half a lemon
  • two thick slices of bread, stale is fine
  • a small knob of butter or a little oil
  • salt

Grate the cucumber coarsely, skin and all, into a sieve over a bowl, salt it well and leave it for ten minutes while you get on with the rest. Whisk the yoghurt with the lemon juice, grate in the garlic, and chop the dill fine, stems included - they carry most of the smell. Tip in the cucumber along with whatever liquid it has given up and enough cold water to bring it to the thickness of pouring cream, then taste and adjust the salt and lemon; it should be cold, sharp and noticeably garlicky. Fry the bread in the butter or oil until the edges catch, or toast it hard if you prefer, and rub the cut end of the garlic clove over one side. Ladle the soup into bowls over an ice cube if you have one, and eat with the toast on the side for dunking.

Serves 2 · about £2.50 · Vegan: use an unsweetened soya yoghurt and a squeeze more lemon

Tomorrow: Keeps a day in the fridge and thickens as it sits; tomorrow it works as a sauce over boiled potatoes or cold lentils.

Archive

Nothing drops off. Today's readings move here tomorrow morning and stay, filed under the entrypoint they came in on. Below is the back-spool already gathered from the network.

Source register

The institutions whose public output feeds this reading. Each is watched every morning for what it publishes openly. Individuals are not listed here.

Soil & Seed

Permaculture Association · Permaculture Magazine · Regeneration International · Seed Savers Exchange · Garden Organic · Navdanya · Biodynamic Association UK · Biodynamic Demeter Alliance · Rodale Institute · Kiss the Ground · Savory Institute · Landworkers Alliance · Sustainable Food Trust · Real Farming Trust · Agroforestry Research Trust · Soil Association · A Growing Culture · Pasture for Life · Farmerama Radio

Land & Water

Ecosystem Restoration Communities · Rewilding Britain · Rewilding Europe · Trees for Life · Knepp Estate · Beaver Trust

Making & Mending

The Restart Project · Low-tech Magazine · Makery · Repair Cafe International · Precious Plastic · Library of Things · Wuyong (Ma Ke)

Shelter & Warmth

Centre for Alternative Technology · AECB · Passivhaus Trust · Community Energy England

Art & Story

Julie's Bicycle · Dark Mountain Project · Emergence Magazine · Orion Magazine · Resurgence & Ecologist

Community & Commons

Shareable · Transition Network · Global Ecovillage Network · Capital Institute

Attention

Bioneers · Gaia Education · Schumacher College · Center for Humans and Nature · Findhorn Foundation