We only need to sequester about 140 ppm of CO2 this time. It would still take tens of thousands of years at the natural rate, but we could probably increase the

We only need to sequester about 140 ppm of CO2 this time. It would still take tens of thousands of years at the natural rate, but we could probably increase the growth rate a hundredfold by carefully selecting high-sequestration cultivars, pumping them full of nutrients, and harvesting them at just the right interval to maintain optimal production. At least it sounds much more promising than the CO2-capturing contraptions I've seen on HN over the years.