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What are we to make of this? The Arctic Tundra has now become a source of carbon dioxide rather than a sink for (absorbing) carbon dioxide. The problems caused by greenhouse gas emissions are compounding. Our ability to accurately quantify the sources and sinks of carbon dioxide and other greenhouse gases IMO is highly questionable. The U.S.. EPA used to issue an annual report on the U.S. Sources and Sinks but I d0 not believe that they are doing that anymore. |
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