Encara no tenim significats per a "upgrading plants".
1That would leave the multibillion-dollar upgrading plants less able to compete with shale oil.
2But it takes years to build upgrading plants.
3Then it must be processed by upgrading plants into light oil that can be fed into refineries.
4However, some upgrading plants have already been delayed or shelved due to spiraling costs and a tight labor supply.
5The Company operates integrated phosphate mining and processing facilities, as well as a number of smaller upgrading plants in the United States.
6Rather than spend money on upgrading plants, the majors have been looking to sell them or turn them into fuel import terminals.
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