Biochar is a lot like this. It's believed to have created the incredible soils of the Amazon basin. Basically, wood gets burned to charcoal rather than ash, and

Biochar is a lot like this. It's believed to have created the incredible soils of the Amazon basin. Basically, wood gets burned to charcoal rather than ash, and the carbon is then buried – creating rich organic soil. One thing worth mentioning though is that people often forget that the trees themselves are not the only aspect of CO2 when it comes to forestry. So-called "natural forests" are apparently much more effective at sequestering carbon, due to the dense web of life contained within them – much more so than the monoculture forests that tend to get planted these days.