The brief

Analyst view

• 358,000 t of rock spread on 444 farms; 78,800 t of CO2 removal expected (company figures).
• Buyers include Microsoft (15,000 t deal, 2024) and Barclays (6,538 t, 2025).
• Uses basalt in the UK and Canadian wollastonite in Ontario.

Technical approach

As reported

Rock

Basalt and wollastonite

Crushed silicate rock, often a by-product of quarrying, is trucked to farms and spread like lime.

Measurement

Conservative, audited accounting

Rock analysis, field data and soil and water measurements estimate removal; transport emissions are tracked and deducted.