Ian Caldwell
Ian Caldwell is research associate of the EcoSanRes programme at the Stockholm Environment Institute (SEI), Stockholm, Sweden. He holds an MSc from the University of Toronto, where his research focused on carbon sequestration capacity enhancement and its economic policy implications at a study site in China.
Peak phosphorus
Arno Rosemarin, Gert de Bruijne, Ian Caldwell | August 04, 2025
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 inequa…
