DDT and other banned chemicals pose threat to vulnerable dolphins on Great Barrier Reef

Scientists find increasing levels of harmful chemicals, causing health issues and links to mass mortality events

Harmful levels of long-banned chemicals, including the pesticide DDT, have been found in the tissues of two vulnerable dolphin species swimming in waters flowing into the Great Barrier Reef.

Scientists found levels of the chemicals in the tissues of snubfin dolphins and humpback dolphins had tripled and, in some cases, risen even higher between 2010 and 2015.