Unfortunately, I have to agree with Tamsin Edwards, that, although 'negative emissions tech' can be helpful in reducing the build up of 'greenhouse gases', they are totally inadequate to 'solve' our global warming problem (https://www.theguardian.com/commentisfree/2020/jul/20/negative-emissions-tech-climate-crisis-carbon). Planting trees and sprinkling the fields with basalt rock dust ('enhanced weathering') will suck carbon dioxide out of the atmosphere (as might directly extracting the gas and storing it). We appear, however, to be so close to the 1.5⁰C (notionally 'safe') increase in average world temperature that we cannot get near to net zero emissions target needed to prevent further climate change without urgent, major changes to modes of energy production (for heating and all forms of transport) and efficiency (in, e.g. the insulation of buildings). We appear to be dangerously near the point of no return.
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