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Systemic changes are needed across the entire agri-food supply chain to address the global impact of conflict and climate change on food shortages, writes an expert in The BMJ 's climate issue.

Elizabeth Robinson at the London School of Economics says although the world is still producing more calories per capita year on year, localized food shortages persist, driven primarily by conflict and also increasingly by climate change.

Conflict disrupts access to food

Conflict disrupts all aspects of food security, she explains.…