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

[Q]: Temperature and sky conditions are both used to describe weather.
[A]: Which two observations are both used to describe weather?

[Q]: Sodium-potassium pumps help nerve cells establish a voltage across their plasma membranes.
[A]: Sodium-potassium pumps help nerve cells establish a voltage across their what?

[Q]: Hydrocarbons compounds, which serve as fuels and are used in manufacturing, are called the driving force of western civilization.
[A]:
What compounds, which serve as fuels and are used in manufacturing, are called the driving force of western civilization?