An anonymous reader quotes a report from the Washington Post: For decades, scientists have tried to figure out ways to reverse climate change by pulling carbon dioxide out of the atmosphere and storing it underground. They’ve tried using trees, giant machines that suck CO2 out of the sky, complicated ocean methods that involve growing and burying huge quantities of kelp. Companies, researchers and the U.S. government have spent billions of dollars on the research and development of these approaches and yet they remain too expensive to make a substantial dent in carbon emissions. Now, a start-up says it has discovered a deceptively simple way to take CO2 from the atmosphere and store it for thousands of years. It involves making bricks out of smushed pieces of plants. And it could be a game changer for the growing industry working to pull carbon from the air.
Graphyte, a new company incubated by Bill Gates’s investment group Breakthrough Energy Ventures, announced Monday that it has created a method for turning bits of wood chips and rice hulls into low-cost, dehydrated chunks of plant matter. Those blocks of carbon-laden plant matter — which look a bit like shoe-box sized Lego blocks — can then be buried deep underground for hundreds of years. The approach, the company claims, could store a ton of CO2 for around $100 a ton, a number long considered a milestone for affordably removing carbon dioxide from the air. […] Graphyte’s approach…
