Cardinal Peter Turkson, who has emerged as a key participant in the development of Pope Francis’ encyclical on the environment and climate change, gave a lengthy address at the World Food Prize Borlaug Dialogues in 2013.

In the speech, Turkson spoke positively of genetic modification as a way to feed the world, but also noted that one third of the food produced in the world today is wasted. He called for dialogue between proponents and critics of genetic modification.

Turkson is scheduled to speak at a Catholic conference on farm and the environment next weekend in Milan.