ocr: The predominantly virgin rainforests covering over 60% of Zaire comprise almost 6% of the world's and 50% of Africa's remaining woodlands. They are home to umportant populations ofseveral endangered species, including gorillas. Laire's poor transportation network has so - far preventedl large-scale commercial exploitation, but fire wood clearance is a problem. The collapse since 1990 of many urban refuse and sewage disposal systems has led to major health and pollution problems.
