Producing weaponized uranium and nuclear material from which nuclear bombs can be built.
nuclear energy (thermal energy)
Countries want them, countries make the laws.
Most countries have zero nuclear weapons.
No truly poor country has nuclear weapons (with the possible exception of North Korea).
Some bombs are nuclear. But most bombs are not nuclear.
It is just one which is Japan. Two cities, namely Hiroshima and Nagasaki, were targeted by the US and were hit by nuclear bombs in WWII.
The problem of nuclear bombs is a difficult one to solve. The ultimate solution will most likely come from cooperation from world countries. This could include an agreement to destroy all existing nuclear bombs, and a commitment not to built up any more.
Uranium is enriched in the isotope uranium-235, producing uranium-238 as waste.
No, China has several hundred nuclear bombs and has had bombs since 1964.
Beacause millions of lives were taken by the nuclear bombs
At this time the US builds no nuclear bombs. A small number of existing bombs are refurbished as needed.