More than $8 billion a year is traded from the illegal poaching of wild animals, the World Wildlife Foundation warned.
Glyn Davies, director of programmes, told ITV's Daybreak: "It's one of the big illegal trades alongside arms, drugs. It's over $8 billion a year traded in wildlife alone and we of course very much appreciate the princes support convening this meeting today."
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After a frosty start, southeastern areas will be dry with increasing amounts of sunshine developing. It will remain cold throughout the day.