Fertile soil can also be found in the islands of Sumatra, Bali, Lombok, Sumbawa, Flores, Wetar and Banda, as well as a part of Sulawesi since these areas are volcanic regions. The remaining islands, such as Papua and Kalimantan, have not demonstrated any recent volcanic activities although there are high mountains. Two types of climate and geology provide a variety of tropical commodities in the Archipelago.