Complex sentence: The human population of the Cardamom Mountain Range although very small is extremely poor and threats to the biological diversity of the region include habitat loss due to illegal logging, wildlife poaching, and forest fires caused by slash-and-burn agriculture.
Split into simpler sentences: The human population of the Cardamom Mountain Range although very small is extremely poor. Threats to the biological diversity of the region include habitat loss due to illegal logging, wildlife poaching, and forest fires caused by slash-and-burn agriculture.