Write three differences between coal and petrolium ?
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Coal = 1 Coal is a power resource , fossil fuel and fund resource.
2 Cost of coal is less .
3 As coal hard and bulky , transport cost is high .
4 Extraction cost of coal is higher.
Petrolium
2 Cost of coal is less .
3 As coal hard and bulky , transport cost is high .
4 Extraction cost of coal is higher.
Petrolium
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