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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.

Groups gear up to issue an emergency alert that carbon dioxide in the global atmosphere has already passed a tipping point. Writing From Sydney -- All around the world, national governments are trying to hammer out their global warming policies, preparing for the United Nations' climate-change conclave in Copenhagen at the end of the year. And in too many places, the effort seems to be going nowhere.