UN International Day 29 August
Message of Ban Ki-moon (UN Secretary-General)
"On this International Day against Nuclear Tests I call on the world to summon a sense of solidarity commensurate with the urgent need to end the dangerous impasse on this issue".
The first nuclear test
The first Soviet nuclear test was conducted on 29 August 1949, four years after the first U.S. nuclear test. The United Nations General Assembly generally declared 29 August as the International Day against Nuclear Tests, In December 2009. This day was proposed by Kazakhstan.Over 2,000 nuclear tests have been conducted since the very first nuclear explosion.
Levels of radiocarbon in the environment
The International Day against Nuclear Tests aims to prevent more of the "destructive and harmful effects on the lives and health of people and the environment" caused by nuclear testing.The largest tests, the 1954 Castle Bravo test and the 1961Tsar Bomba had an explosive power of around 1,000 and 4,000 Hiroshima bombs,respectively.
The Comprehensive Nuclear-Test-Ban Treaty is the international instrument to end all nuclear testing in a verifiable way. Currently 183 States have signed the Treaty and 162 have ratified it.