World Scientists’ Warning to Humanity: A Second Notice

Twenty-five years ago, the Union of Concerned Scientists and more than 1700 independent scientists, including the majority of living Nobel laureates in the sciences, penned the 1992 World Scientists’ Warning to Humanity (see supplemental file S1). These concerned professionals called on humankind to curtail environmental destruction and cautioned that null great change in our stewardship of the Earth and the life on it is required, if vast human...