Kaugnayan ng Heograpiya sa Panahong Paleolitiko/Neolitiko​

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.

Don’t use up to much of them it leads to pollution