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Upon closer examination, however, we see that smartphone CTR drops off much more rapidly than either desktops or tablets, at an average of 30% per position, versus 22% and 28% respectively.

Article investigating the current state of LED lighting solutions. Studies suggest that a complete conversion to the lights could decrease carbon dioxide emissions from electric power use for lighting by up to 50 percent in just over 20 years; in the United States, lighting accounts for about 6 percent of all energy use. A recent report by McKinsey & Company cited conversion to LED lighting as potentially the most cost effective of a number of simple approaches to tackling global warming using existing technology.

by Daniel J. Weiss, Daniel Wagener, Center for American Progress Action Fund