The article discusses how human activities are increasingly affecting the global nitrogen cycle. By analyzing data from 1860 to the early 1990s and making projections for 2050, the researchers found that human activities now dominate the nitrogen budget globally and in most regions. They also discovered that nitrogen accumulation is happening in many environmental reservoirs. The study highlights the disconnect between terrestrial and open ocean nitrogen budgets and identifies uncertainties in natural nitrogen fixation rates and nitrogen storage in environmental reservoirs.