Uncontrolled fires, sweeping over vast areas of the interior nearly every summer, place in jeopardy the future economic development of that portion of Alaska. The area involved is vast but the resources that can be used in perpetuity, even under wise management, are relatively modest - certainly there is no excess to be wasted. Potential production of cellulose on the better forest lands in the interior is considerable. On the 40 million acres of commercial or potentially commercial forest land, it is estimated that net annual growth is about 960 million cubic feet. Following a severe fire, a minimum of 100 years and an average period of perhaps 160 years must elapse before spruce sawlogs can again be obtained from the burned area.