A United Nations food agency is pushing a new kind of diet for a hungry world.

It ranks high in nutritional value and gets good grades for protecting the environment: edible insects.

The Rome-based Food and Agriculture Organization hailed the likes of grasshoppers, ants and other members of the insect world as an underutilised food for people, livestock and pets.

A new report says two billion people worldwide already supplement their diets with insects.

Insects are high in protein and minerals, need far less feed per kilo of mass than cattle do and produce far less greenhouse gas per kilo than pigs.

While most edible insects are gathered in forests, the UN says mechanisation can boost insect-farming production.

Currently most insect farming serves niche markets.

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This was the embarrassing moment a man found himself surrounded by police in a McDonald's after getting stuck in a baby's high chair.

Police were called to the fast food restaurant in Cork, Ireland, in the early hours of Tuesday morning after the customer got jammed in the grey safe seat.

He was eventually released and sent on his way without charge.

A McDonald's spokesperson said: “McDonald’s is aware of the incident involving a customer who decided to sit in one of our children’s high-chairs in Winthrop Street – and as you can see, we recommend that children don’t use the high-chair without adult supervision!”