What is one frequent drawback of damming rivers? a. it can disrupt river ecosystems. b. dams cause significant heat pollution. c. it can increasingly deplete freshwater resources. d. dams may suddenly fail, causing severe flooding.

Africa 63. what continent has more countries than any other in the world? 64. how many languages are spoken in africal? 65. what type of climate is a sahel? 66. how many regions is africa divided into? 67. what is the dominate climate in africa? 68 where is the great rift valley located? 69. what is the highest mountain in africa? 70. what 2 african countries were never colonies?