What is the name of the weather phenomenon in which a layer of warmer air overlays a layer of cooler air?
A) temperature inversion
B) smog trap
C) greenhouse effect
D) convection cap
Question 2
________ fertility is the level of fertility at which a population neither grows nor shrinks.
A) No-growth-model
B) Replacement-level
C) Plateau
D) Sustainment-level