system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 why nuclear bomb tests don’t cause nuclear winters and other effects from nuclear bombs?
gpt
They do cause all the same effects as a nuclear weapon dropped in war. The only difference is one of numbers. It is anticipated that if nuclear war ever occured that the involved nations will launch all of their available weapons. In the case of the U.S., Russian, and China this total will be in the thousands. There have been quite a few nuclear tests performed over the last 80 years, but they were spread out over time and still don't approach anywhere near that total.