PARIS, France (AFP) — Australia’s Great Barrier Reef may never recover from last year’s warming-driven coral bleaching, said a study Wednesday that called for urgent action in the face of ineffective conservation efforts. Record-high temperatures in 2015 and 2016 drove an unprecedented bleaching episode, which occurs when stressed corals expel the algae that live in their tissue and provide them with food. Bleached coral is more susceptible to disease, and without sufficient time to recover […]