Nuclear fallout refers to the radioactive particles that are released into the atmosphere after a nuclear explosion or accident. These particles can include various isotopes, which can be harmful to human health and the environment. Fallout can settle on the ground, contaminate water sources, and affect food supplies, posing long-term risks to living organisms. The effects of nuclear fallout depend on factors such as the size of the explosion and weather conditions. Areas close to the explosion site may experience higher levels of radiation, while wind can carry fallout over long distances. Protective measures, such as evacuation and sheltering, are crucial in minimizing exposure to radiation.