If your hippocampus has of late been focused on carbon emissions, warming, heat, floods and fires and species loss, it is probably oblivious to a far more elemental broth that is brewing. Nitrogen compounds are present in the air we breathe, the water we drink, the land we live on. Excessive concentrations of these compounds in soil, water, and air are wrecking the environment at local, regional, and global levels. We’re affected on multiple fronts by them. Indeed man-made forms of reactive nit