After working in oil and gas, and then a climate-centric venture capital fund, I was looking to create an impact as the climate emergency was only growing. I started a direct air capture (DAC) company, which removes carbon from air and sequesters it into earth’s crust. While the technology is interesting, it is also very energy-intensive, making scaling up challenging. At the same time, I was visiting small-holder farmers in Chhattisgarh as part of a nonprofit I had donated to. I realised that a lot of them were getting lower and lower productivity because of degrading soil. I did some back-of-the-envelope calculations, took some samples of rock and soil to figure out if there was viability in doing enhanced rock weathering. When I did the testing with our partners at Yale University, th

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