OTTAWA - Some of Canada's allies are praising Ottawa's work on preventing Russia from smuggling oil through concealed ships — ships that Ottawa fears could someday unleash an environmental cataclysm in the Arctic.

Canada and its allies have blacklisted more than 400 unregistered ships — known as shadow vessels — in just six months.

The effort aims to starve Russia of funding for its war on Ukraine while preventing leaky ships from one day compromising Canada's Arctic environment.

"The idea of illegal, substandard, uninsured vessels transiting through High North and Arctic waters was, is, and remains a terrifying prospect," said David Angell, a foreign and defence policy adviser to Prime Minister Mark Carney, during a panel hosted by the Polish Embassy in Ottawa on Oct. 10.

The issue is

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