 Nitrogen pollution is a major threat to coral reefs in South Asia, but the full extent of the damage caused by this pollutant is still unknown. There is some evidence that nitrogen pollution may interact with other environmental factors to cause further damage to coral reefs, but more research is needed to fully understand the effects of nitrogen pollution on these ecosystems. This article was authored by Stuart C. Painter, Yuri Artioli, Fathomath Hannah Amir, and others.