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Ancient Carbon Dioxide Was 5 Times Higher
New Haven CT (SPX) Jun 23, 2005 Earth's carbon dioxide levels 34 million to 45 million years ago were five times today's levels, Yale University said Wednesday of an ancient sea algae study. "Through the energy we consume, each of us makes a contribution to increasing greenhouse gasses, such as carbon dioxide and methane, in the Earth's atmosphere," said lead Yale researcher Mark Pagani. "To understand the implications of these actions for the future, scientists look to the past to gain a better understanding of Earth's climate system under high greenhouse gas conditions," he said. The National Science Foundation study, reported in Science Express, also noted the link between sharp drops in worldwide carbon dioxide levels 25 million to 33 million years ago and the rise of important food crops such as corn and sugarcane. "The onset and stabilization of ice sheets at the same time as a decline in carbon dioxide illustrates the importance of atmospheric carbon dioxide as an agent of both climate and biological change," Pagani said. All rights reserved. Copyright 2004 by United Press International. Sections of the information displayed on this page (dispatches, photographs, logos) are protected by intellectual property rights owned by United Press International. As a consequence, you may not copy, reproduce, modify, transmit, publish, display or in any way commercially exploit any of the content of this section without the prior written consent of by United Press International. Related Links SpaceDaily Search SpaceDaily Subscribe To SpaceDaily Express
Climate Change Could Threaten China's Landmark Tibet Railway
Beijing (AFP) Jun 23, 2005Rising temperatures on western China's Qinghai-Tibet Plateau may pose a threat to the world's highest railway, which is due to go into operation next year, state media said Thursday. |
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