Independent (UK): Rising acidity in oceans is leading to a global catastrophe that would be unparalleled in tens of millions of years, according to the national science academies of 69 countries which want governments to take the issue more seriously in the run-up to the December climate change conference in Copenhagen. The rate at which the oceans are turning acidic because of rising carbon dioxide concentrations in the atmosphere is faster than at any other time since the extinction of the dinosaurs …