# Barclays makes its first carbon removal purchase: 6,538 tonnes from UNDO's rock weathering in Ontario

Canonical page: https://technooptimist.io/stories/barclays-makes-its-first-carbon-removal-purchase-6-538-tonnes-from-undo-6150b96c
Date: 24 Sep 2025
About: [UNDO](https://technooptimist.io/companies/undo.md) · [UNDO Enhanced Rock Weathering](https://technooptimist.io/agriculture/undo-rock-weathering.md)
Original source: https://www.esgdive.com/news/barclays-turns-to-enhanced-rock-weathering-for-first-carbon-removal-deal-undo/802500/

Barclays agreed to buy 6,538 tonnes of permanent CO2 removal from UNDO, which will spread crushed silicate rock across 10,000 acres of farmland in Ontario, Canada. Barclays called it the largest enhanced rock weathering deal of its kind by a British buyer.

## Key facts

- UNDO was founded in 2022 and is based in London
- Other UNDO buyers include Microsoft, British Airways and McLaren Racing

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