Researchers suggest a low-tech carbon sequestration method: burying wood underground to delay its decomposition and lock in CO2 for thousands of years. Forests absorb significant CO2, but decomposers release it back into the atmosphere. By using simple tools like tractors and backhoes, wood can be buried in conditions that impede decay. Climate scientist Ning Zeng tested this by entombing wood under clay soil in Quebec, potentially offering a cost-effective alternative to expensive carbon-capture technologies.