Large amounts of nitrogen oxide compounds are produced in particular by intensive lightning over land. (sciencedaily.com)
That reduction was due in part to a decrease in the amount of nitrogen in both types of plants when they grew in the high - atmospheric CO2. (globalpossibilities.org)
However, it is considered responsible for more than a 200 % increase of nitrogen in wastewater, resulting in higher treatment costs. (constantinealexander.net)