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The marine engineer then drove for another 40 miles before shooting Fay MacKenzie and her husband John in their home on the Scottish mainland.

She told the court Mr MacDonald, a marine engineer, was on sick leave after suffering a back injury in spring 2022 when he visited osteopath Mr MacKenzie.

“In general, there are insufficient data about microplastics concentration in the ocean,” says University of Michigan marine engineer and study coauthor Yulin Pan.

To ensure reliability, said Kiley Sampson, a marine engineer who is operations manager for Sustainable Marine Canada, the project has adapted proven technologies from ships and offshore oil drilling.

She also paid the educational fees for the first marine engineer officer from Mauritius.