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

Over 90% of the energy we use comes originally from the sun.
Over 90% of the energy we use comes originally from what?

Some materials have negative heats of solution; the dissolution of one of these solutes in water is called?
Some materials have negative heats of solution; the dissolution of one of these solutes in water is called?

Electroluminescence does a neon light produce visible light.

How does a neon light produce visible light?