According to the International Union for Conservation of Nature (IUCN) database, about 1 in 5 mammals are threatened with extinction. Rates of the threat vary depending upon the group, but it does show a problem. As human population increases, the demand placed upon local area increases, especially in developing countries in Africa and Asia. Government attempts at stopping poachers has not been very effective, and laws that aim to "protect" threatened species often come at the cost of property rights and human care.