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

[EX Q]: You call materials that have high resistance to electric current electric insulators.
[EX A]: What do you call materials that have high resistance to electric current?

[EX Q]: Sexually do invertebrates reproduce.
[EX A]: How do invertebrates reproduce?

[EX Q]: Industry is the greatest source of hazardous waste.
[EX A]:
What is greatest source of hazardous waste?