“A nuclear war using only a fraction of existing arsenals would produce massive casualties on a global scale—far more than we had previously believed,” said Ira Helfand, the study’s author and co-president of the International Physicians for the Prevention of Nuclear War (IPPNW).
In a previous study in 2012, the Nobel Peace Prize-winning IPPNW and Physicians for Social Responsibility said that a nuclear famine could kill more than a billion people.
The new study - Nuclear Famine: Two Billion People at Risk? is based upon research published by climate scientists who have assessed the impact of nuclear explosions on the Earth’s atmosphere and other ecosystems. According to the study, a nuclear war using as few as 100 weapons anywhere in the world would disrupt the global climate and agricultural production so severely that the lives of more than two billion people would be in jeopardy.