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Increasing human activity-induced carbon dioxide emission since the Industrial Revolution has turned oceans 30 per cent more acidic taking a heavy toll on marine organisms both small and big, the German scientists will inform the 23rd conference of Parties of the UN Framework Convention of Climate Change scheduled to begin in Bonn on November 6, 2017. Gigantic carbon sinks, oceans take up about a third of rising carbon dioxide emissions. But when absorbed by sea water, the greenhouse gas triggers chemical reactions, causing the ocean to acidify. This acidification, along with global warming, will not only impair marine life, but also compromise important ecosystem services that oceans provide to humankind.