This measure can be taken for safety reasons. It recovers CH4 before the coal is mined. It is an emission reduction option if CH4 is then used for energy generation. Wells can be drilled in advance of mining, within the mine or from the surface. In typical mining regions such as China, Eastern Europe and Russia, a 90 per cent reduction in venting losses can be achieved by 2025, and in the US a 70 per cent reduction is possible, at an estimated cost of $40 per tonne of CH4 emission reduction. In other regions, a reduction of 30-50 per cent can be achieved by 2025 using this strategy (IEA, 1999).
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