France, May 22 -- European supermarket shelves could become emptier as climate change and biodiversity loss threaten food production in countries that export to the EU, a report published on Wednesday warned.

The study by UK-based consultancy Foresight Transitions examined six major food imports - cocoa, maize, rice, wheat, coffee and soy - and found that more than half come from countries highly exposed to climate shocks and lacking the resources to adapt.

"These are not abstract threats - they are already manifesting concretely, negatively affecting businesses, jobs, and the availability and price of food for consumers," said Camilla Hyslop, one of the report's authors.

"And the situation is only getting worse."

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