Heirloom | 32,603 followers on LinkedIn. Mitigating the worst impacts of climate change by developing the world’s most cost-effective CO2 removal technology | Mitigating the worst impacts of climate change by developing the world’s most cost-effective DAC technology to permanently remove CO2 from the atmosphere. Our technology rapidly accelerates the natural processes that enable limestone to absorb carbon dioxide from the air from a timespan of years to days. In 2023, Heirloom established the first and only Direct Air Capture facility in North America that permanently captures CO2.