NPS pollution study By 13StarsManager - January 20, 2014 0 361 FacebookTwitterPinterestWhatsApp Interns measure plots of California sagebrush that have been injected with various levels of nitrogen as part of a three-year study to learn how air pollution is impacting native plants and fire risk. Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Like this:Like Loading... Related