instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Humans possess greater diversity of genetics type, compared to laboratory animals.
answer:
Humans possess greater diversity of what type, compared to laboratory animals?

question:
Fires, mainly caused by lightning, are a natural disturbance in temperate grasslands.
answer:
Fires, mainly caused by what, are a natural disturbance in temperate grasslands?

question:
Solar and wind are still expensive compared to fossil fuels.
answer:
Solar and wind are still expensive compared to what?