In 1971, he spent a month in the Soviet Union, where he was detained by the
KGB after interviewing Soviet dissidents and human rights advocates. His four-part series on the Soviet underground, written for
The Village Voice, was reprinted in the Congressional Record. In 1974, he edited a book for Scripps-Howard on the Congressional Watergate Committee hearings. In 1979, the
Boston Globe hired Gelbspan as a senior editor. In his capacity as special projects editor, he conceived, directed, and edited a series of articles on job discrimination against African-Americans in Boston-area corporations, universities, unions, newspapers, and state and city government. The series won a Pulitzer Prize in 1984. In 1991, he published an investigative book about FBI abuses during the 1980s. The book exposed the domestic aspect of the Iran-Contra scandal, documented a secret relationship between the FBI and the National Guard of El Salvador, and detailed a campaign of surveillance, harassment, and break-ins that led to the entry of the names of 100,000 political and religious activists in the FBI terrorism files. That same year, he wrote a series of articles that contributed to the closing of an aging, unsafe nuclear power plant in Western Massachusetts.
The Heat Is On Bill McKibben wrote, "Until you've read this book, you're ill-equipped to think about the planet's future."
The New York Times Book Review said "No other reporter has told the story as comprehensively or explored its implications for human welfare as searchingly as Gelbspan" (quoted on cover of paperback edition of
The Heat Is On). A major theme of
The Heat Is On is the treatment of the climate change issue in the U.S. Congress during the 1990s. Chapter 3 is entitled "A Congressional Book Burning". Gelbspan recounts numerous House and Senate hearings where Republican representatives and Senators focused on and endorsed the views of scientists who oppose the mainstream scientific assessment of global warming such as
Patrick Michaels,
S. Fred Singer, and
Richard Lindzen. == Personal life ==