Lawyers for teenagers claiming the U.S. government failed to protect the environment from global warming plan to question under oath President-elect Donald Trump’s pick for secretary of state on his knowledge of climate change. Exxon Mobil Corp. Chief Executive Officer Rex Tillerson’s testimony, set for the day before the Jan. 20 inauguration, is being sought by lawyers representing 21 children and teenagers seeking to prove that oil and gas industry groups “have known about the dangers of climate change since the 1960s and have successfully worked to prevent the government” from taking action.