FILE - In this Jan. 9, 2009 file photo smoke rises from the steel company ThyssenKrupp in Duisburg , western Germany. Levels of carbon dioxide in the atmosphere have steadily increased since the days of the industrial revolution, contributing to the greenhouse effect that is spurring global warming.  (AP Photo/Frank Augstein, file)
Two centuries of burning fossil fuels has left a perilous legacy. Frank Augstein / AP

Abu Dhabi Climate Meeting set to spur leaders to action