The United Nations Treaty on the Prohibition of Nuclear Weapons (TPNW)-an important planetary health good-entered into legal force in January 2021. Evidence of the consequences of nuclear war, particularly the global climatic and nutritional effects of the abrupt ice age conditions from even a relatively small regional nuclear war, indicates that these are more severe than previously thought. None of the nine nuclear-armed states is disarming; instead, all invest enormously in new and more hazardous nuclear weapons. Nor has any of the 32 states claiming reliance on another state's nuclear weapons yet ended such reliance. These factors, abrogation of existing nuclear arms control agreements, policies of first nuclear use and war fighting, growing armed conflicts worldwide, and increasing use of information and cyberwarfare, exacerbate dangers of nuclear war. Evidence-based advocacy by health professionals on the planetary health imperative to eliminate nuclear weapons has never been more urgent.
Keywords: Existential risk; Nuclear disarmament; Nuclear famine; Nuclear winter; Treaty on the Prohibition of Nuclear Weapons.
© 2021. The Author(s), under exclusive licence to Springer Nature Limited.