That's the question Les Knight, spokesman for the whimsically titled Voluntary Human Extinction Movement, wants you to answer.
To be a volunteer means deciding not to have children. For VHETM believers it's a decision for the planet, for species that aren't human, for frogs and lowland gorillas, polar bears and albatrosses.
Knight, a substitute high school teacher in Oregon, made that decision some 40 years ago. Is he serious? Should humans really try to make themselves extinct?
Tell us what you think - what do humans do for the Earth's biosphere that isn't about humans?