This was followed up by "Newsweek" and elsewhere in the media. Patrick Michaels boasted that the "Cosmos" article had been read into the Congressional Record. The issue was even raised by Admiral James Stockdale in the televised vice-presidential debate. Gore's response was to protest that Revelle's views in the article had been taken out of context. Roger's daughter, Carolyn Revelle, wrote:  Contrary to George Will's "Al Gore's Green Guilt" Roger Revelle—our father and the "father" of the greenhouse effect—remained deeply concerned about global warming until his death in July 1991. That same year he wrote: "The scientific base for a greenhouse warming is too uncertain to justify drastic action at this time." Will and other critics of Sen. Al Gore have seized these words to suggest that Revelle, who was also Gore's professor and mentor, renounced his belief in global warming. Nothing could be further from the truth. When Revelle inveighed against "drastic" action, he was using that adjective in its literal sense—measures that would cost trillions of dollars. Up until his death, he thought that extreme measures were premature. But he continued to recommend immediate prudent steps to mitigate and delay climatic warming. Some of those steps go well beyond anything Gore or other national politicians have yet to advocate. Revelle proposed a range of approaches to address global warming. Inaction was not one of them. He agreed with the adage "look before you leap", but he never said "sit on your hands". During his last decade at UCSD and SIO, Revelle continued to work and teach. In the early 1980s, he taught undergraduate STPA seminars twice a year, in Energy and Development (mainly on problems in Africa), the Carbon Dioxide Problem (known now as the Global Warming problem), and Marine Policy. In 1986 he won the Balzan Prize for Oceanography/Climatology. A 1990 heart attack forced him to move his course to the Scripps Institution from the Revelle College provost's office, where he continued to teach the Marine Policy program until his death the following year. In 1991, he was awarded the National Medal of Science by President George H. W. Bush (one of about 500 recipients in the 20th century). He remarked to a reporter: "I got it for being the grandfather of the greenhouse effect." Revelle died in San Diego on July 15, 1991 from complications of cardiac arrest.