Times (UK): Scientists studying Australia’s Great Barrier Reef may have detected the first signs of impact of ocean acidification after finding a sharp cut in growth rates in some corals. Oceans become acidic when carbon dioxide (CO2) emitted by humanity dissolves in sea water. This increase in acidity makes it harder for marine organisms to grow and maintain their shells. The researchers studied a common coral species called porites, growing along the northern end of the Great Barrier …