Climeworks — Direct Air Carbon Capture & Storage

Heirloom accelerates natural limestone weathering to capture CO₂ from the air and permanently store it in concrete and soil. Their enhanced weathering process spreads pulverized limestone on agricultural land, where it absorbs CO₂ within months instead of the natural centuries-long timeline. This dual-use approach also improves soil pH and crop yields for farming communities.

• ✦Limestone-based carbon capture — no chemicals, no energy-intensive processes
• ✦Spreads on agricultural land, improving soil health and crop productivity