article_snippet.sent: China has imposed a one-year ban on ivory imports amid criticism that China citizens' huge appetite for ivory threatens the existence of Africa's elephants .
article_snippet.sent: Poachers have killed tens of thousands of African elephants for their tusks in recent years to meet demand for ivory in Asia.
article_snippet.sent: China has imposed a one-year ban on ivory imports amid criticism that China citizens' huge appetite for ivory threatens the existence of Africa's elephants.
article_snippet.sent: Poachers have killed tens of thousands of African elephants for their tusks in recent years to meet demand for ivory in Asia .