The soil that we walk on every day may be an important tool for helping address the climate change crisis. Soils contain the largest stocks of carbon on land and they naturally remove carbon dioxide from the atmosphere. Soil is a living system, housing vast communities of microbes – including bacteria and fungi – and invertebrates that break down organic matter, releasing carbon and other nutrients into the soil pool. In some ecosystems, soils can store, or sequester, carbon for a long time. But the key: keeping soils healthy.