"There is not really any dispute in my field about the relationship between CO2 and the environment," said Dr. Kerry Emanuel, professor of atmospheric science at the Massachusetts Institute of Technology, during his recent talk. According to Dr. Emanuel, our climate is generally warming and today the concern isn't another Ice Age—it's that someday there might be no ice at all. http://www.volpe.dot.gov/news/experts-discuss-climate-change-and-resiliency-planning