Why China's coal mines are under climate scrutiny for belching methane - The Washington Post
Death toll in China mining accident rises to 21 - World
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Coal mine cart runs off the tracks in northeastern China, killing 12 workers
More bodies found in China mine collapse, 48 remain missing
18 Chinese miners killed in underground gas leak
Chinese coal mine collapse leaves 19 dead
7 dead in China coal mine accident
Unsafe practices blamed in deadly China mine blast - The San Diego Union-Tribune
PDF) Research on Cause of Dynamic Disaster of Deep Mining Control