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Russian scientists said in December that this spill could be more than twice the size of a similar disaster in the strait in 2007, which saw up to 1,600 tonnes of heavy oil leak into the sea.

Footage recorded by the Russian NGO The Earth Touches Everyone and included below appeared to show large amounts of heavy oil accumulating on the seabed.

Despite claims of being a climate leader and steward of endangered southern resident orcas, the Canadian government quickly purchased the incomplete heavy oil pipeline for $3.3 billion, insisting it was in the national interest.

The remaining heavy oil tends to sink, making cleanup unlikely in the Salish Sea’s deep straits.

In Japan, exports fell in August for a second straight month, weighed by declines in China's demand for steel and heavy oil and stoking fears of a downturn in the face of elevated global interest rates.