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

Ex Input:
The height of the wave is used to determine the magnitude of an earthquake.

Ex Output:
What measurement of the wave is used to determine the magnitude of an earthquake?


Ex Input:
The mesopause is at the top of the mesosphere.

Ex Output:
What is at the top of the mesosphere?


Ex Input:
Nitrogen dioxide is a byproduct from the combustion of fossil fuels like coal and gasoline.

Ex Output:

What is a byproduct from the combustion of fossil fuels like coal and gasoline?