Positively carbon
A substantial amount of carbon gets into the soil via plant roots.
Such ‘negative emissions’ are essential to keep global warming below 1.5 to 2o C.
Because some processes, especially in industry and agriculture, cannot be completely decarbonised, CO2 must be withdrawn from the atmosphere to compensate. This is what plants do. They use water, sunlight, and CO2 to form biomass. If the biomass rots or burns, the CO2 is cycled back into the atmosphere, but if it is converted by microbes into humus, it is stored in the soil.
