Nuclear fallout refers to the radioactive particles that fall to the ground after a nuclear explosion or accident. These particles can be carried by the wind and can contaminate air, water, and soil. Fallout can pose serious health risks, including radiation sickness and increased cancer risk, depending on the level of exposure. The effects of nuclear fallout can last for years, as some radioactive materials take a long time to decay. Areas affected by fallout may require evacuation and decontamination efforts to protect public health. Understanding fallout is crucial for emergency preparedness in the event of a nuclear disaster.