A controlled burn (sometimes also called a prescribed fire) is a fire that is started on purpose, and kept under control. It is done by people who are trained in controlling a fire, with the right equipment and the right weather conditions. It is done to help the environment or to make an area safer for people.[1]
This is not the same as a practice fire, where a firefighter crew might start a fire in a house or other building that is going to be destroyed. They use it for practice, to learn how to enter a burning house safely and how to put out a house fire. Controlled burns, on the other hand, are done outdoors in forests or prairies.