Not only has climate change worsened the drought situation in sub-Saharan Africa and Australia, but also population growth has played an important role. In sub-Saharan Africa, high population has increased the pressure on water and land demand in agriculture. Even though Africa has abundant water resource, many sub-Saharan African people have faced water shortage issues. Meanwhile, over-farming has resulted in soil depletion and has exacerbated poor harvest. However, the main population issue in Australia has been rural demographic shifts. The family farm and farm succession in Australia have declined with the drought. The young continuously have moved to towns for advanced education and job opportunities, and the elderly have been left in
