Others emphasize a buildup of combustible materials. The nature of such fuel accumulations runs the gamut, including swamp drainage in Indonesia, rainforest destruction in Amazonia, self-thickening woods in American wildlands as a result of fire exclusion, and everywhere the intrusion of urban sprawl and fire-prone houses.
有人强调可燃物的积累。燃料积累的内容无所不包，包括印度尼西亚的沼泽排水、亚马逊流域的热带雨林毁灭、因祛火而导致的美国森林的自我增厚，以及无孔不入的都市扩张和防火住房。