Dallas Morning News: Visitors to the Perot Museum of Nature and Science can stand beside an enormous rotating drill bit, take a virtual ride down a fracking well and run their fingers along the smooth, dark surface of the Barnett Shale, the natural gas-rich rock that has fueled Texas energy boom.
But as several reviews have pointed out, the Perot Museum makes only a few subtle references to one of the most pressing issues in science: how human activities, primarily emissions from coal, oil and gas plants, are contributing...