Years of Living Dangerously is an American documentary television series, spread over two seasons, focusing on climate change. The first season, consisting of nine episodes, was broadcast on Showtime in 2014. The second season, consisting of eight episodes, was broadcast on the National Geographic Channel in 2016. Executive producers included James Cameron, Arnold Schwarzenegger, and series creators Joel Bach and David Gelber. Joseph Romm and Heidi Cullen were the chief science advisors. The series won an Emmy Award as Outstanding Documentary or Nonfiction Series.

Joseph J. Romm is an American researcher, author, editor, physicist and climate expert, who advocates reducing greenhouse gas emissions to limit global warming and increasing energy security through energy efficiency and green energy technologies. Romm is a Fellow of the American Association for the Advancement of Science. In 2009, Rolling Stone magazine named Romm to its list of "100 People Who Are Changing America", and Time magazine named him one of its "Heroes of the Environment (2009)", calling him "The Web's most influential climate-change blogger".