Global Warming | Solar Variability Has Not Caused Recent Global Warming

In the following viewpoint, Judith Lean and David Rind assert that the role of a variable sun in global warming accounts for, at best, one-half of the recorded warming since 1850 and less than one-third of the warming observed over the last twentyfive years. The most likely cause of climate change since the start of the Industrial Revolution 150 years ago, according to the authors, is the growing atmospheric concentration of greenhouse gases originating from human activity. Judith Lean is a solar physicist at the U.S. Naval Research Laboratory in Washington, D.C. David Rind is a...

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