Acacia plantations near Tesso Nilo National Park, Indonesia. The park is threatened due to palm oil and acacia plantation expansion inside the National park. This forest complex has one of the world’s highest recorded diversities of plants and supports key populations of critically endangered Sumatran elephants and tigers. It was designated a national park in 2004, but most of the natural forest in and around the Tesso Nilo has already been replaced by industrial pulp and palm oil plantations.