Arno Rosemarin is research and communications manager of the EcoSanRes programme at the Stockholm Environment Institute (SEI), Stockholm, Sweden. He specializes in water resources management, limnology and aquatic toxicology. Previously he worked at the Canada Department of Fisheries and Oceans, the Baltic Sea Laboratory in Karlskrona, Sweden, and editor-in-chief of AMBIO at the Royal Swedish Academy of Sciences.
Phosphorus, a key component of fertilizers, is crucial for the world’s food supplies. But as reserves of phosphate begin to run out, the impacts are likely to be immense – in terms of rising food prices, growing food insecurity and widening inequalities between rich and poor countries.