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Coal mining
Coal mining
The transformation of the coal mines
Angle - a news agency for science and the environment
October 29, 2017
One response
Curbing the emission of pollutants from burning coal
Dr. Asaf Rosenthal
September 19, 2008
6 תגובות
Hell on earth - Google Earth special
Ran Levy
May 23, 2008
11 תגובות
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