Carbon dioxide removal (CDR), is the deliberate removal of carbon dioxide (CO2) from the atmosphere through a range of human activities. CDR is a process meant to reverse the global warming effects caused by greenhouse gasses through “negative emissions.” Also called carbon drawdown, this involves storing or locking carbon into plants (reforestation or afforestation), oceans (ocean-based carbon retention), soils (soil carbon sequestration), and biomass materials (biomass carbon removal) among others. SPUN aims to encourage the continued sequestration of carbon in mycorrhizal networks, and to stop the carbon release caused by loss of fungal networks.