According to Pierce, if a thousand warheads are launched across the territory of the United States, the strike will lead to climate change, which will cause massive famine in the United States. Because of this, according to the scientist, about 140 thousand people will die annually in the USA.

At the same time, he believes that if the United States uses all of its nuclear weapons, human losses could increase to 5 million annually.

Pierce noted that in this regard, even an unrequited attack by the American side on the PRC or Russia could be detrimental to the United States.

Earlier, the United States conducted exercises in the event of a nuclear war in Europe.