The trees blanketing one-third of the Soviet Union constituted more than one-quarter of the earth’s forest cover. Most densely wooded was a latitudinal belt stretching from the western border to the Pacific, bounded in the north by tundra and in the south by steppe lands. Growth was mostly conifers in the northern part of the belt, broad-leafed trees in the south, and a mix in the center. The forestry industry supplied commercial timber, firewood, and raw material for the pulp and paper, chemical, and woodworking industries. Total production was about 400 million cu m (about 14 billion cu ft) in the late 1980s, the same as two decades before. Soviet output of roundwood (wood that has not been squared off) was 12 percent of world production; about 5 percent of it was exported.