• Welcome to Learn About Nuclear Weapons!

    Learn About Nuclear Weapons is a web-based educational material from the Swedish Physicians Against Nuclear Weapons for those who want to learn more about nuclear weapons, their consequences and what you can do to help create a nuclear weapons-free world.


    Learn more about nuclear weapons

earth missile puff transparent

Where are nuclear weapons?

Which countries have nuclear weapons? There are currently 9 countries with nuclear weapons, together they have about 13,000 nuclear weapons.

Read more

What happens when a nuclear weapon explodes?

Nuclear weapons are the most powerful weapon ever created. The damage from a nuclear weapon comes from a blast wave, thermal radiation and radiation.

Read more

disaster puff transparent

The consequences of nuclear weapons

Nuclear weapons are unique in their destructive capacity: a single weapon can devastate a city, or a country, in an instant and kill hundreds of thousands of people.

Read more

A single nuclear weapon can devastate a city in an instant

Nuclear weapons are unique in their destructive capacity. A single nuclear weapon can devastate a city and kill hundreds of thousands of people in an instant.

A nuclear explosion means a severe humanitarian disaster. The intense heat of a detonation causes bodies to completely vaporize and cause severe burns. The pressure wave travels several miles crushing buildings, infrastructure and people. The radioactive fallout that follows can cause radiation sickness and cancer that can lead to death.

With hospitals in ruins, medical personnel killed or injured and a lack of medical equipment, it will be very difficult to treat the large number of the injured.

For teachers

Every generation has an opportunity to change the world. This is our chance to abolish nuclear weapons. Through knowledge and commitment, we can influence our own and our children’s future.


Read more

“All mankind is now learning that these nuclear weapons can only serve to destroy, never become beneficial.”

/Alva Myrdal