Senate Hearing of James E. Hansen (1988)
On June 23, 1988, American climatologist James E. Hansen testified before the United States Senate Committee on Energy and Natural Resources regarding global warming, during a period of high temperatures in the United States. The hearing marked one of the earliest instances in which anthropogenic climate change was prominently addressed in U.S. political and media discourse, having previously been discussed primarily in academic contexts.
Source: Wikipedia — Senate Hearing of James E. Hansen (1988) (CC BY-SA 4.0)