Science, Maths & Technology
Earth's physical resources: extracting coal and oil
...Open cast mines A fault is an underground hazard. By drilling a series boreholes, miners start the safe development of an open cast mine. Oil in sand and shale How to get crude oil from the Athabasca oil sands and from Colorado oil shale - among the world's largest deposits of oil. Hidden oil reserves Describing what the Athabasca oil sands look like and the unique...