why did the us and ussr entered many agreements like ctbt ctbt said after 1963(for 1 mark answer)
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Answer:
It is widely understood that nuclear weapons have only been used twice in wartime and with terrible consequences. Often overlooked is the fact that they have been “used” elsewhere—through more than 2,000 nuclear test explosions by at least eight countries since 1945.
These nuclear test explosions have been used to develop new nuclear warhead designs and to demonstrate nuclear weapons capabilities by the world’s nuclear-armed states. The tests, particularly the atmospheric detonations, have negatively affected the lives and health of millions of people around the globe. In response, ordinary citizens, scientists, legislators, and government leaders have pursued a multi-decade effort to bring into force a global verifiable comprehensive nuclear test ban. Currently, the treaty has 184 signatories and 168 ratification, though it still will not enter into force until eight key states, including the United States, ratify it.