According to them, more than five billion people could die of hunger, including almost the entire population of America, Europe, Russia and China.
Experts say that the confrontation between the two nuclear powers may enter a hot phase. If one of the parties to the conflict tries to use nuclear weapons, there will be an instant response.
The first attacks will disable electrical and electronic networks, and only then will military and nuclear facilities become the target, say scientists.
They clarified that it is impossible to predict the exact number of people who will survive such a catastrophe.