The Hill: Rock dust could put a drain on atmospheric carbon — will this technology work?

„Faced with the daunting task of rapidly curbing global warming to reduce the most devastating effects of climate change, humanity finds itself confronted with something akin to a “bathtub” problem: Just because you turn off the faucet doesn’t mean that the water instantly goes down the drain. In the context of climate change, this means that even if we can dramatically reduce carbon dioxide emissions, the high levels we’ve already emitted and the future emissions we can’t avoid will keep us well above 2 degrees Celsius of warming compared to the pre-industrial era. At this point, humanity needs to increase the size and speed of the atmospheric carbon dioxide drain, removing billions of tons of carbon dioxide each year and securely transforming this greenhouse gas to a solid-state. So, just how will this new atmospheric plumbing feet be accomplished? Many ideas have been proposed and to some extent tested […].No solution is without its set of issues. […] There is no free lunch when it comes to carbon dioxide removal. One of the most promising approaches that tick these boxes involves the repurposing of rock dust into agricultural soils, which can be gathered in hoards from the mining industry, demolition of buildings, or cement and steel manufacturing.“