 A proposed 51 km long and 50-m-wide highway through the area that would enable 850 truckloads of coal a day to pass is considered by environmental groups as a major threat to the wildlife.The proposal would remove an estimated 154 hectares of rainforest, would ease access for illegal hunters and loggers and would fragment the habitat of the Sumatran tigers.Small holder conversion of the forest to oil palm is another major threat to the forest and the objectives of ecosystem restoration.