The Strait of Hormuz may be the world's most important oil chokepoint, but its closure is sending shockwaves through something even more fundamental: the global food supply.

At the 2026 US-Canada Summit in Toronto, hosted by Eurasia Group and RBC, GZERO's Tony Maciulis sat down with Alzbeta Klein, CEO and Director General of the International Fertilizer Association, as part of a larger panel discussing food insecurity, to trace the chain of consequences that begins with blocked fertilizer shipments in the strait and impacts the global food supply months from now.