Donald D. Humphreys, a senior executive with oil giant ExxonMobil Corp., was speaking of the controversy over carbon emissions and global warming during a recent Wharton Leadership Lecture when he noted that, “We would just like to be in the debate, and not viewed as, ‘…We’re bad and nobody likes us.'” The carbon emissions issue is just one of several controversies surrounding the world’s largest corporation — a list that includes gasoline prices surging towards $4 a gallon, ExxonMobil’s push for expanded oil exploration and drilling at home and abroad, and its high-profile war of wills with the president of Venezuela, Hugo Chavez. During his remarks, Humphreys, senior vice president and treasurer of the Irving, Texas-based behemoth, said one reason he welcomed the opportunity to speak to a Wharton audience was to erase widely held misconceptions about the powerful company that traces its roots back to the 19 th century and John D. Rockefeller.…