In principle slowing down the return of carbon back to the cycle is helpful, even if it isn’t a permanent solution. In many ways this is exactly what trees are;

In principle slowing down the return of carbon back to the cycle is helpful, even if it isn’t a permanent solution. In many ways this is exactly what trees are; a way to convert a ton or so of fast cycle carbon into wood that will retain it for a century or so. Of course, the numbers matter. I can’t speak to Biochar, since it might not hold onto the carbon long enough.