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addaword.gifdefinition of tar sands

noun
(also oil sands)
sand or sandstone that contains bitumen, a thick and sticky form of petroleum. Tar sands oil is regarded as more polluting than conventional liquid oil.
A cargo believed to be Europe's first major shipment of tar sands oil arrived in Spain this week.
Submitted from United Kingdom on 10/06/2014 10:35:00
Definition of tar sands from the Open Dictionary – a public resource hosted by Macmillan English Dictionary Online

dark pool

a method of financial trading in which share prices are hidden and not openly available to the public

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