James N. Galloway was a notable American biogeochemist who made significant contributions to our understanding of the global nitrogen cycle and its impact on the environment. He was a professor of environmental sciences at the University of Virginia and a member of the US National Academy of Sciences.
One of Galloway's greatest contributions to science was his research on nitrogen deposition, which demonstrated the widespread effects of human activities, such as fossil fuel combustion and agriculture, on the global nitrogen cycle.
He co-authored a seminal paper on the topic, which helped establish the field of biogeochemistry.
Another important contribution was his work on the role of nitrogen in the Chesapeake Bay ecosystem, which showed that excessive nutrient inputs were causing harmful algal blooms and oxygen depletion. This research led to the establishment of policies to reduce nitrogen pollution in the region.