By ridding a forest of dead leaves, tree limbs, and other debris, a prescribed burn can help prevent a destructive wildfire. Controlled burns can also reduce insect populations and destroy invasive plants. In addition, fire can be rejuvenating. ... As a result, without fire these species cannot reproduce.

Why is controlled burning bad?

The smoke and particulates released during controlled burns can negatively affect air quality. Inhaling these substances is dangerous for human health and can cause short- and long-term respiratory problems including asthma, chronic obstructive pulmonary disease (COPD), bronchitis, and pneumonia.

Are controlled burns harmful?

California's efforts to prevent dangerous wildfires through controlled burning have long stumbled on the issue of smoke, with residents, doctors and pollution regulators worried that such burns create too much unhealthy air. ...