The following sources are cited in SAP Digital Futures Issue 32: Why We Must Rethink the Global Food System

Malnutrition is the largest contributor to disease in the world.
Ensure healthy lives and promote well-being for all at all ages, Food and Agriculture Organization of the United Nations.

Nearly 25% of children worldwide are malnourished, contributing to reduced school performance and impaired brain development.
Undernutrition contributes to nearly half of all deaths in children under 5 and is widespread in Asia and Africa, Unicef, January 2018.

Food systems account for 70% of the world’s freshwater use, consume 30% of its available energy, and produce 20-30% of its greenhouse emissions.
Food Quality and Food Safety, The World Bank, April 18, 2017.
For Up to 800 Million Rural Poor, a Strong World Bank Commitment to Agriculture, The World Bank, November 12, 2014.

Agriculture is the most significant driver of deforestation, which rose 51% from 2015 to 2016.
 and Global Tree Cover Loss Rose 51 Percent in 2016, World Resources Institute, October 23, 2017.