The global response to the refugee crisis is being challenged by the “sheer enormity” of the problem, according to a senior UN humanitarian official.

Some 65 million people around the world were displaced at the end of 2015.

More than a million migrants and refugees made their way to Europe last year, 350,000 from Syria alone.

Kyung-wha Kang is the Deputy Emergency Relief Coordinator at the United Nations.

She’s been speaking to Jocelyn Frank.

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