Car Fumes, Weeds Pose Double Whammy for Fire-Loving Native Plants February 15, 2024 Home Explore The Naturalist's Journal Car Fumes, Weeds Pose Double Whammy for Fire-Loving Native Plants Share FacebookTwitterEmail A recent study led by Justin Valliere, assistant professor in the UC Davis Department of Plant Sciences, found that native wildflowers and other plants that typically flourish following a fire were, instead, replaced by invasive plants on land that received the kind of nitrogen contained in vehicle emissions.