News & Analysis, Op Eds, Letters to the Editor

  1. Frey, H.C., and J. DeCarolis, “Taking on Clean Power Plan Claims,” Letter to the Editor, News and Observer, Raleigh, NC, August 21, 2015.
  2. Frey, H.C., “Natural Gas Increases Have Cost Most Coal Jobs,” Letter to the Editor, News and Observer, Raleigh, NC, November 16, 2016, page 12A.
  3. Frey, C., “Clearer way in life as app appraises risks,” The Standard, Hong Kong, October 10, 2018.
  4. Frey, H.C., “A rush to judgment: The Trump administration is taking science out of air quality standard,” The Conversation, November 26, 2018.
  5. Frey, H.C., “The EPA disbanded our clean air science panel. We met anyway – and found that particle pollution regulations aren’t protecting public health,” The Conversation, October 29, 2019.
  6. Frey, H.C., “EPA decides to reject the latest science, endanger public health and ignore the law by keeping an outdated fine particle air pollution standard,” The Conversation, May 1, 2020.
  7. Frey, H.C. “EPA must use the best available science − by law − but what does that mean?“, The Conversation, April 7, 2025.
  8. Frey, H.C., “How Trump’s ‘gold standard’ politicizes federal science,” The Conversation, June 5, 2025.
  9. Glaberman, S., H.C. Frey, T. Tal, “ The US Environmental Protection Agency’s retreat from science endangers the health of people and the planet”, The Conversation, July 18, 2025.
  10. Frey, H.C., “4 laws that could stymie the Trump EPA’s plan to rescind the endangerment finding, central to US climate policies”, The Conversation, August 12, 2025.