Question: Is chaff produced by hydropower?, Answer:Yes, Description of Hydropower: energy derived from falling or running water, Fact1: Chaff is excess material from milled grain., Fact2: Some mills use hydropower to mill grain.
Step1: Where does Chaff come from?, Step2: Do some #1's use hydropower to do it's function?, Wikipedia page for step 1: Chaff, Wikipedia page for step 2: Mills, not_definitive_answer: False, incorrect_answer: False