Leonard Nimoy

Stanford University's noted global warming alarmist and Al Gore advisor Stephen Schneider appeared in a 1978 television program warning Americans of a coming Ice Age.

For those that have forgotten, "In Search of..." was a televised documentary series from 1976 to 1982 that was normally narrated by Leonard Nimoy.

In the May 1978 episode "The Coming Ice Age," Nimoy presented to viewers facts about the previous Ice Age, and discussed how the bitterly cold winters of 1976 and 1977 might be a harbinger of a new one: "Climate experts believe the next one is on its way. According to recent evidence, it could come sooner than anyone had expected." 

One climate expert cited was Stephen Schneider, a climatologist working for the National Center for Atmospheric Research at the time who was asked to address some of the possible solutions being discussed to stop the coming Ice Age such as using nuclear energy to loosen the polar icecaps (video embedded below the fold, relevant section at 6:04, h/t Minnesotans for Global Warming via Bob Ferguson):