Final answer:
Nuclear war and accidents have severe impacts on humans and the environment, including radiation exposure, health issues, ecosystem collapse, and climate change.
Explanation:
Nuclear war or nuclear accidents can have devastating impacts on human beings and the environment. The effects can include widespread radiation exposure, leading to acute health issues and long-term repercussions such as cancer. Additionally, nuclear incidents can result in ecosystem collapse and climate change due to widespread fires and radiation contamination.
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