Okay kiddo, so do you know what air pollution is? It's when the air around us becomes dirty and unhealthy to breathe.
Calpuff is a computer program that helps scientists and government officials figure out how air pollutants move through the atmosphere. They use it to figure out how much pollution is in the air and where it is coming from.
It's kind of like a video game, but instead of controlling a character, scientists put in data about the size of the pollution particles and how much is being released into the air. Then the program shows them where the pollution will end up and how it will spread out over time.
By using Calpuff, scientists can figure out how pollution affects the air we breathe and how to make it better. They can tell people to not drive as much or to use cleaner energy sources to help reduce pollution.
So Calpuff helps make the air we breathe healthier, and that's really important!