Durable Carbon Removal
Like Duolingo, but for Durable Carbon Removal. 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.
A short one: 12 levels across 2 sections, about 24 minutes end to end, roughly 5 days at five minutes a day. It moves through The Permanence Frontier and Locking Carbon in Stone. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android

Key ideas in Durable Carbon Removal
- CO2 remains in the atmosphere for thousands of years after emission
- Reversal risk is the chance that stored carbon is re-emitted prematurely
- Durable removal uses geological or mineral storage to match that 10,000-year scale
- Wildfires and logging turn biological carbon sinks into carbon sources
- Biological sinks like soil and forests typically cycle carbon back in decades
- Engineered methods like Direct Air Capture with saline storage have near-zero reversal risk
- The distinction between geological and biological storage timescales
- Understanding reversal risk in biological vs. engineered storage
- Net-negative means removing more than you currently emit to address historical debt
- Offsets only aim to cancel out current emissions, maintaining the status quo
- Additionality requires that the CO2 removal only happened because of the credit sale
- Durable removal is the only way to actually lower the total atmospheric concentration
- High-quality durable removal often has high costs that require specific carbon funding
- Forests (Afforestation) store carbon for decades to centuries
- The logic of net-negative math versus simple offsetting
- Biochar stabilizes carbon in soil for hundreds of years
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Durable Carbon Removal 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.
Here's what playing it feels like
A real question from this course. Take your best guess.
What do we call the danger of tucked-away carbon escaping back into the sky before it's supposed to?
Get it right to open this lesson and 11 more in the app.
Where Durable Carbon Removal takes you
Move beyond temporary offsets and explore the high-permanence technologies designed to lock carbon away for millennia.
- 1
The Permanence Frontier
- Beyond the Forest
- Direct Air Capture Mechanics
- 2
Locking Carbon in Stone
- Mineralization and Geologic Storage
- Accelerating Earth's Natural Cycle
2 sections · 4 units · 12 levels. Built to play, not to enroll.
You pick the voice
Durable Carbon Removal is taught in the Explain Like I'm 5 style: no big words. promise.. 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 Durable Carbon Removal today.
Download Tomo, search Durable Carbon Removal, and play your first lesson in under a minute.