https://phys.org/news/2018-10-food-scraps-dairy-meat-substitutes.html

A mix of misaligned policies and incentives have created a situation in which the world produces far more food than it needs, Timmermans says.

Hundreds of millions of tonnes of food are discarded as waste, while some is used as animal feed, even though much of it is still fit for human consumption. Put differently, only 55% of the world's crop calories go directly to humans. In the EU alone, around 88 million tonnes of food are thrown away each year.