answers: nearly 200 countries phase down hfcs
questions: how many countries took steps to phase down hfcs? nearly 200 countries took steps to do what?
paragraph: Today, nearly 200 countries took an historic step to #ActOnClimate for future generations by phasing down HFCs: The White House (@WhiteHouse) October 15, 2016
questions_answers: question: how many countries took steps to phase down hfcs?, answer: nearly 200 countries | question: nearly 200 countries took steps to do what?, answer: phase down hfcs