What was the goal of the pan african conferences

Why did alexander go primarily east and south from macedonia and greece in his conquest

Why are slanted roofs found on many buildings within russia and finland? a. to prevent ice slides. b. to prevent the build-up of water during heavy rains. c. to prevent heat from escaping during the clod winter months. d. to prevent snow build-up.

Wha industry did the refrigerated rail car impact the most