Green-valve-stem caps aren't a fashion choice — they signify that the tire contains nitrogen instead of regular air. There are benefits to this, but it's not always easy to find a place to get ...
An ecologically realistic 24-year field study of grasslands showed that elevated levels of carbon dioxide nearly tripled species losses attributed to nitrogen pollution. Dozens of studies have ...
Plants that survived dinosaur extinction pulled nitrogen from air, study concludes Nov 16, 2023 Habitats much more vulnerable for nitrogen deposition than previously thought ...