Recent peer-reviewed studies by atmospheric scientists predict that even a relatively "limited" nuclear war between India and Pakistan, in which each side uses 50 Hiroshima-sized nuclear weapons against the other's cities, could create immense firestorms that would quickly surround the planet with a dense stratospheric smoke layer.
The black smoke would be heated by the sun, lofted like a hot air balloon, and would remain in the stratosphere for years. There it would block and prevent a large fraction of sunlight from reaching the Earth’s surface. The sharp reduction of warming sunlight would reduce growing seasons, cause crop failures and lead to the starvation of hundreds of millions of people (some predict up to 1 billion people).
A nuclear war between the U.S. and Russia, which each possess thousands of thermonuclear weapons, would have even more severe consequences.
The only way to eliminate the threat of nuclear famine is by eliminating all nuclear weapons. Please write to President Obama and your members of Congress today and encourage them to take swift action to eliminate this existential threat.