Global
food insecurity and famine from reduced crop, marine fishery and
livestock production due to climate disruption from nuclear war soot
injection
Atmospheric
soot loadings from nuclear weapon detonation would cause disruptions to
the Earth’s climate, limiting terrestrial and aquatic food production.
Here, we use climate, crop and fishery models to estimate the impacts
arising from six scenarios of stratospheric soot injection, predicting
the total food calories available in each nation post-war after stored
food is consumed. In quantifying impacts away from target areas, we
demonstrate that soot injections larger than 5 Tg would lead to mass
food shortages, and livestock and aquatic food production would be
unable to compensate for reduced crop output, in almost all countries.
Adaptation measures such as food waste reduction would have limited
impact on increasing available calories. We estimate more than 2 billion
people could die from nuclear war between India and Pakistan, and more
than 5 billion could die from a war between the United States and
Russia—underlining the importance of global cooperation in preventing
nuclear war.