Last updated at 15:31
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The illegal trade in elephant ivory

Elephant poaching in Africa becoming more common because more and more people want to get hold of the ivory in the animals' tusks.
These young animals are being cared for in an elephant orphanage in Kenya. Their parents were killed by poachers, for their tusks.
Young African elephants
These African elephants may be roaming around happily, but the ivory in their tusks is in big demand - and poachers will kill the animals to get it. A BBC Panorama programme has found that elephant poaching is rising sharply.
Herd of African elephants
In 1989, international ivory trading was banned, but this didn't stop people from doing it illegally. This bag of tusks was seized before it made its way to the shops.
Illegal ivory
But it's difficult to determine ivory that is legal, like the ivory these ornaments are made from, and poached ivory. This makes the fight against the illegal trade very difficult.
Ornaments carved from legal ivory
Not all ivory is illegal though; this man is making a carving from legal ivory - that's ivory that was bought before the 1989 ban. Ornaments like these are one of the ways the material is used and a country where it is still in big demand is China.
Man carving ornaments out of legal ivory
Last year large collections of illegal ivory were seized - the most over 20 years. A large elephant tusk like this one can go on to sell for thousands of pounds.
Large illegal elephant tusk