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The World Scientists’ Warning to Humanity: An Introduction
The World Scientists’ Warning to Humanity was a document written in 1992 by Henry W. Kendall and signed by about 1,700 leading scientists. In late 1992, the late Henry W. Kendall, a former chair of the board of directors of the Union of Concerned Scientists (UCS), wrote the first warning World Scientists’ Warning to Humanity, which begins: “Human beings and the natural world are on a collision course.” The World Scientists’ Warning of a Climate Emergency was published in BioScience Magazine.

A majority of the Nobel Prize laureates in the sciences signed the document; about 1,700 of the world’s leading scientists appended their signature. 25 years later, in November 2017, 15,364 scientists signed World Scientists’ Warning to Humanity: A Second Notice written by William J. Ripple and seven co-authors.

In 2019, a World Scientists’ Warning of a Climate Emergency was published. In February of 2021, the United Nations Environment Programme (UNEP) published the ‘Making Peace with Nature‘ report.

Later in 2021, the IPCC Sixth Assessment Report, Climate Change 2021: The Physical Science Basis was published.” The warnings provide the latest analysis and research pertaining to the climatological emergency and the sixth mass extinction event.

Scientists’ Warning to Humanity’s ‘Most Talked About Paper’
In the following introductory video, Thomas M. Newsome explains the history and portent of Scientists’ Warning to Humanity’s ‘Most Talked About Paper.’