Which is NOT a factor for why Sub-Saharan Africa is the poorest region of the world? Colonialism failed to produce infrastructure and strong governmental institutions. Widespread government corruption siphoned off billions of dollars from development aid. Failed government programs and economic nationalism produced noncompetitive industries. Poor climates and soils throughout the region have limited settlement and development. Structural adjustment programs led to a reduction of spending on basic services.The two Southwest Asia and North Africa countries with the largest proven reserves of natural gas are Iran and Iraq Saudi Arabia and Yemen Israel and Egypt Saudi Arabia and the United Arab Emirates (UAE) Iran and Qatar