ELI5: Explain Like I'm 5

AP 42 Compilation of Air Pollutant Emission Factors

Air pollution means dirty air that can harm people, animals, and plants. Pollution comes from many things, like cars, factories, and even burning wood in fireplaces.

To help control pollution, the government created a special book called "AP 42 Compilation of Air Pollutant Emission Factors." This book has information on different things that cause pollution, like cars and factories. It tells us how much pollution they create, and how we can reduce it.

Think of it like a recipe book, except instead of cooking food, it tells you how much pollution different things make and how to make less of it. By using this book, we can all work together to make the air cleaner and healthier for everyone to breathe.