Often lost in the debate over climate change and CO2 emissions is the link between rising carbon dioxide levels and ocean chemistry. Since the early 19th century, scientists have understood carbon dioxide as a greenhouse gas. Late in the 19th century researchers began to suspect that CO2 emissions could alter climate. For at least the past three decades the link between rapidly rising greenhouse gas emissions and climate change has become established. But it has only been in the past few years those emissions could adversely affect the chemistry of the oceans, making ocean waters more acidic, with potentially catastrophic consequences for marine life

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