If glacier once covered a region there are likely to be lakes or bodies of water uncontaminated from outside sources
While building the pyramids, the Egyptians developed hieroglyphics. <span />
Answer:
Limestone areas are predominantly affected by chemical weathering when rainwater, which contains a weak carbonic acid, reacts with limestone. This causes the limestone to dissolve. Carbon dioxide from the respiration of animals (and ourselves) is one cause of increased carbon dioxide in the atmosphere.
