ScienceDaily: A new study finds that human activities are likely contributing far less nitrogen to the open ocean than many atmospheric models suggest. That's generally good news, but it also nullifies a potential side benefit to additional nitrogen, says Meredith Hastings, associate professor of Earth, environmental and planetary sciences at Brown University and one of the study's co-authors. "People may not be polluting the ocean as much as we thought, which is a good thing," said Hastings, who is also a fellow...