News Earth Wildfires and farm fertilizer use are fueling ozone pollution Those sources now rival cars and factories in emitting the chemicals that help create ozone Wildfire smoke, seen here blanketing Los Angeles in 2020, can drive up ground-level ozone pollution. E4C/Getty Images By Rachel Berkowitz March 20, 2025 at 9:00 am Share this:Share Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print Images of California’s wildfires this winter speak for themselves about the fires’ devastating effects. But those pictures don’t tell the whole story.