Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Input: Consider Input: Air quality is a measure of pollutants in the air.

Output: Air quality is a measure of what in the air?

Input: Consider Input: You see a faster reaction rate when the concentration of reactants is higher.

Output: What kind of reaction do you see when the concentration of reactants is higher?

Input: Consider Input: A hill do concentric circles on a topographic map indicate.
Output: What do concentric circles on a topographic map indicate?