Chinese authorities said March 25 they had controlled a leak of toxic heavy metal into a river, after ... pollution source and treated river water to remove the thallium, adding that concentrations ...

Beijing-The Chinese authorities said on March 25 they had controlled a leak of toxic heavy metal into a river, after ... areas. China has cracked down on environmental pollution in recent years ...

Beijing: Chinese authorities said Tuesday they had controlled a leak of toxic heavy metal into a river, after media ... areas. China has cracked down on environmental pollution in recent years ...