The rainforest on the island of Borneo – the third largest island in the world – is estimated to be around 140 million years old, making it one of the oldest rainforests in the world. Known as Asia’s last great rainforest, it is a mix of lowland and montane rainforest located above 1,000m (3,300ft). The Borneo lowland rainforest in particular is diminishing due to logging, hunting and conversion to commercial land use – so much so that in 2007 the Heart of Borneo Initiative was launched by the WWF to save one of the largest rainforests in the world. The …