Could a cup of coffee actually remove carbon from the atmosphere?
Full disclosure: I’m part of the team behind Climate Coffee—and we know “carbon-negative coffee” sounds like a pretty bold claim.
This 50-second video explains what we mean:
Truly Carbon-Negative, Closed-Loop Coffee Roasting
Instead of relying on conventional fossil-fuel roasting, our process uses waste biomass—including coffee byproducts, spent coffee grounds and roasting chaff, even used coffee filter—to generate heat. During that process, a portion of the carbon is converted into biochar: a stable, useful form of carbon that can be kept out of the atmosphere for the long term.
The goal is a closed-loop roasting system that:
- Replaces fossil-fuel heat
- Gives coffee waste a productive second life
- Produces biochar while roasting
- Removes more carbon than the full process emits
- Uses indirect heat so combustion gases never contact the beans
But none of that matters if the coffee doesn’t taste great—which is why cup quality remains just as important as carbon removal.
We’d genuinely like the coffee community to pick this apart: What data would you want to see from a company claiming to make carbon-negative coffee? Full lifecycle accounting? Roast profiles? Emissions testing? Blind tasting results?
We’re building something different, and thoughtful skepticism is absolutely welcome.