Which of these events occurred during the chana empire?
timbuktu was developed into a center of learning,
islam was introduced into the west african region
moroccan invaders conquered the empire,
a large amount of technology was developed.

What do most climatologists see as a major cause of rising global temperatures? a. earth's closer proximity to the sun due to its gravitational pull b. greenhouse gases produced by burning fossil fuels c. rising ocean levels caused by melting polar ice sheets d. water pollution cause by industrial waste