May 4, 1972:
The Vancouver-based Don't Make a Wave Committee
, formed to oppose U.S. nuclear weapons testing in the Aleutian Islands, officially changes its name to the Greenpeace Foundation.
May 4, 2007:
The Intergovernmental Panel on Climate Change (IPCC) issues a major report
calling human-induced climate change "unequivocal," and predicting that average temperatures will rise between 2 and 11.5 degrees Fahrenheit by the year 2100.
May 4, 2012:
The Heartland Institute launches the first of a series of billboards
likening advocates of climate change action to villains like the Unabomber, Charles Manson, and Osama bin Laden. The electronic billboard alongside a Chicago freeway is taken down a few hours later after an uproar that sees Heartland supporters, funders and staffers flee the group.