An oil spill on the Sela river in Bangladesh is threatening rare Irrawaddy dolphins in Sundarbans National Park. A Bangladeshi oil tanker collided with another boat on Tuesday, spilling thousands of gallons of oil into the river. The slick has now spread along a 40-mile stretch of the river and environmentalists fear for the future of many endangered animals, including the critically endangered Irrawaddy dolphin. Read more: bbc.co.uk
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