Intentional burning of forests to clear land in Southeast Asia can have a hidden multiplier effect it often ignites fires in outcrop deposits of coal or peat, which can smolder underground for many years before flaring up and restarting the cycle of forest and brush fires that have plagued the region. Michael S. Hamilton, Richard O. Miller, and Alfred Whitehouse describe efforts to transfer technology and training needed for controlling this problem. Intentional burning of forests to clear land in Southeast Asia can have a hidden multiplier effect. This article describes efforts to transfer technology and training needed for controlling this problem.