ReThink History: The Price of a Tonne
A tonne of carbon dioxide is the strangest commodity ever traded. Nobody wants it, its value is the value of its absence, and the whole market rests on two things no one can see: the tonne itself, and the world in which it was emitted. Since 1997 we have built, broken and rebuilt markets for that tonne — Kyoto's flexible mechanisms, Europe's emissions trading system and the five-billion-euro tax carousel that looted it, California's cap-and-trade and its forest offsets, the United Nations scheme to pay tropical forests to stand, and a voluntary offset market that touched two billion dollars a year and then lost most of it when journalists and scientists found that most of what it sold did not exist. Fourteen episodes walk that history with dates and sources: the Chinese and Indian refrigerant plants paid more to destroy their waste gas than to make their product; the phantom rainforest credits Disney, Shell and Gucci bought, and the registry rebuttals that followed within hours; the hundred-year wildfire insurance fund that burned through in a decade; the World Bank carbon pioneer indicted over cookstove data, who denies the allegations and has not been tried; the satellites now trying to weigh the world's forests from orbit, and the one that cannot legally switch on over America; and the carbon border charge that went live on Europe's imports in January 2026. A coda then takes the restoration forestry almost everyone agrees on — thinning, cultural and prescribed fire, a native understory — and asks whether any carbon market on earth can pay for it. Compiled by a physician who spent eighteen months in 1976 and 1977 at a Forest Service laboratory in Moscow, Idaho, cutting Douglas-firs into disks and counting their rings for the growth model that still projects every forest-carbon baseline in California, and who now builds software for this market. Every over-crediting finding is presented with the registry's or regulator's rebuttal and its date; every pending criminal matter is described in the present tense with the presumption of innocence. AI-narrated from a fully cited research dossier for every episode.
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Episodes
Ep 1 — The Price of a Tonne
In 1968 a University of Toronto economist named John Dales published a 111-page essay arguing that a government should decide how much pollution it would tolerate, print exactly that many rights, and sell them — "no person, or agency, has to set the price." That is where carbon markets, cap and trade, and carbon offsets begin: with a commodity nobody can see, whose entire value is the value of its absence. Episode 1 lays out the three answers economics gave to the same question — Pigou's tax (1920), Coase's bargain (1960), and the tradable permit that Thomas Crocker and John Dales arrived at independently in 1966 and 1968 — and then corrects the origin story most people are told.
Ep 2 — The Day of the Atmosphere
On December 8, 1997, Al Gore landed at a deadlocked climate conference in Kyoto and instructed the American delegation to show flexibility — on one condition: the treaty had to contain market mechanisms.
Ep 3 — The Factory That Was Paid to Pollute
In 2012 a chemical company in Gujarat, India, earned about $187 million from carbon credits — not for the refrigerant it manufactured, but for incinerating the waste gas the refrigerant plant produced.
Ep 4 — The Carousel
On June 2, 2009 the Paris exchange BlueNext traded 19.8 million tonnes of European emission allowances in a single day — a record that had nothing to do with anyone's smokestack.
Ep 5 — The Golden State's Market
On November 14, 2012 California sold the right to emit 23 million tonnes of carbon dioxide at $10.09 a tonne, and the largest carbon market in the Western Hemisphere opened for business.
Ep 6 — Weighing a Forest
In 1976, in Moscow, Idaho, a young biologist spent eighteen months at the Forest Service's Forestry Sciences Laboratory felling Douglas-firs and cutting them into disks — one from the base, then up the stem every ten feet or ten years of height growth, measuring the diameter and counting the rings at each — so that a computer model could learn how much tree hides behind a diameter, and how fast it had got there.
Ep 7 — Common Practice
In July 2021 the Bootleg Fire burned through the Klamath East project near Bly, Oregon — one of the forest carbon offset projects whose credits California's regulated polluters had bought to cover their emissions.
Ep 8 — Paying the Forest to Stand
In December 2007, at the UN climate conference in Bali, the world accepted an idea Kyoto had refused: pay tropical countries for the carbon in forests they choose not to cut.
Ep 9 — Phantom Credits
On January 18, 2023 the Guardian, Die Zeit and SourceMaterial published nine months of work under a headline that ended an era: more than 90% of the rainforest carbon offsets certified by Verra, the world's largest registry, were worthless.
Ep 10 — The Three Verbs
Every carbon offset is three promises stapled together: that the tonne would not have been saved anyway, that it will stay saved, and that saving it here did not simply move the emission there.
Ep 11 — The Fraud Files
On the morning of October 2, 2024, three US agencies moved at once against one carbon-credit developer.
Ep 12 — Ground Truth
On April 29, 2025 a rocket left Kourou carrying the first P-band radar ever put in orbit — a twelve-metre mesh umbrella built to see through the canopy and weigh the trunks of the world's tropical forests.
Ep 13 — The Border
On January 1, 2026 the European Union's carbon border adjustment mechanism stopped being a reporting exercise and became a bill.
Ep 14 — The Thing the Market Can't Buy
In northeast Washington there is a sawmill rebuilt in 1987 to cut a four-and-a-half-inch log, a coalition of loggers and conservationists that has held since 2002, and a national forest where the Forest Service has tripled the acres it treats each year.
Explore further
Part of the listening path Forests, Fire & the Carbon Ledger (stop 7 of 7).
The Restoration Bargain
The Mother Tree
Fire Returns to My Backyard
Ground Truth: Forest Service Research