The National Research Council, an arm of the National Academy of Sciences of the United States of America, says greenhouse gases are accumulating in the Earth's atmosphere as a result of human activities, causing surface air temperatures and subsurface ocean temperatures to rise. Temperatures are, in fact, rising. The changes observed over the last several decades are likely mostly due to human activities, but we cannot rule out that a significant part of these changes is also a reflection of natural variability.
Joe Lieberman: “The National Research Council, an arm of the National Academy of Sciences of the United States of America, says…”
Editor's note · Context
Discussing the scientific consensus on global warming and its human causes.
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