The melting Greenland ice sheet. Previous instances of massive global warming may not have been caused by carbon dioxide. Photo: AP

Science & Research

Earth's most recent 'super warming' event not caused by carbon dioxide: scientists

Stephen Chen

Published: 7:01am, 29 Jul, 2015

Updated: 7:01am, 29 Jul, 2015

The melting Greenland ice sheet. Previous instances of massive global warming may not have been caused by carbon dioxide. Photo: AP

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