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Crude from a tanker suspected of belonging to Russia's shadow fleet, which ran aground in June, has come ashore on Oman's mainland and is approaching the country's largest island and a nature reserve, the United Nations said, while monsoon weather delays salvage work. Iran is dealing with a separate spill near Qeshm, and experts cited by The National say the environmental damage from the war could pollute Gulf land, sea and air for years.