Sniffer dog at work
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How sniffer dogs are used to stop ivory smuggling

26 September 2016 Last updated at 11:58 BST

The world's elephants are currently in crisis.

Tens of thousands are being killed every year for their ivory tusks, which are smuggled around the world and sold for large amounts of money.

In order to tackle this illegal trade in ivory, authorities try to find it when it is being transported so it can be taken away.

One of the ways they do this is by using specially trained sniffer dogs, who can smell ivory through cases.