What can happen when groundwater is depleted to irrigate crops?
a. increase in ground altitude
b. decrease in soil salinity
c. loss of sinkholes
d. loss of wetlands

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.

Answera discharge of static electricity;