Okay kiddo, let's talk about the Chernobyl disaster. A long time ago, a big accident happened at a nuclear power plant in Chernobyl, which is a place in a country called Ukraine.
When the accident happened, lots of harmful radiation was released into the air and the soil around the plant. Radiation is a type of energy that can be very harmful to people and animals when they are exposed to it for a long time.
The radiation from the Chernobyl accident affected lots of people and animals nearby. People who were exposed to the radiation got sick and some even died. Animals like cows and sheep that lived in the area also got sick and some of them had to be destroyed.
The radiation from the Chernobyl accident also affected the environment in the area. It made some plants and animals mutate and change in weird ways. Some animals that lived in the area couldn't have babies anymore because the radiation harmed their reproductive system.
Because of the Chernobyl disaster, lots of people still can't live in the area today because it's too dangerous. The accident also taught us that nuclear power is very powerful and can be dangerous if not handled carefully.