By Amrith Ramkumar | Sept. 7, 2023 5:30 am ET The Wall Street Journal
Deal with Heirloom Carbon is one of largest ever purchases of carbon-removal credits
Most of the world’s efforts to remove carbon from the atmosphere use giant, vacuum-like devices that suck in air and isolate the carbon.
is funding a new approach that uses crushed-up limestone to achieve the same result.
The tech company said Thursday it agreed to buy credits from startup Heirloom Carbon for the removal of up to 315,000 metric tons of carbon dioxide over 10 years. That would amount to a purchase commitment of at least $200 million based on market prices and would offset the equivalent of the annual emissions of around 70,000 gasoline-powered cars.
The deal will help Microsoft neutralize its carbon emissions and is one of the largest ever purchases of carbon-removal credits.
It also shows how carbon removal is quickly becoming a major industry even as the technologies are still developing. Business leaders such as Microsoft and JPMorgan Chase and governments are funding a range of approaches, including burying carbon-rich plant material and tweaks to the ocean’s chemistry that increase carbon absorption.
Carbon Removal Using Crushed Up Rocks Startup Heirloom Carbon uses low-cost limestone to absorb carbon from the air.
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