A 4,000-liter diesel spill in the Tjeldsund waters off northern Norway has formed a blue oil slick that impedes gas exchange in the water column. Toxic substances in the diesel, such as polycyclic aromatic hydrocarbons (PAHs), readily adsorb onto sediments and accumulate through the food chain. This poses acute and chronic threats to plankton, shallow-water organisms, and sensitive coastal ecosystems.
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