Scientists at the University of Canterbury are investigating whether protein and sugar extracted from leaves could feed humanity after a major global catastrophe. The work, led by Associate Professor David Denkenberger, aims to identify practical food sources if shocks like nuclear war or supervolcanoes cripple conventional agriculture.
Denkenberger has spent over a decade studying food resilience in extreme scenarios. The research focuses on extracting leaf protein and sugar from plant fiber — a potential emergency food supply that could prevent mass starvation when global systems fail.
The team acknowledges significant hurdles. Processing leaves into edible nutrients at scale would require infrastructure that might not survive a disaster, and the nutritional completeness of such diets remains unproven.
If successful, the approach could offer a critical bridge for populations cut off from staple crops. However, it underscores how fragile modern food systems are and how few backup plans exist for worst-case events.
Some experts caution that focusing on extreme scenarios risks diverting resources from more immediate food security challenges affecting millions today.