The investigation by a handful of attorneys general into ExxonMobil has much more to do with the oil major misleading investors than it does about covering up climate science. The legal headache stems from several news reports that ExxonMobil buried decades of internal climate science in order to protect its interests. That has environmental groups crying foul, blaming the oil company for decades of policy inaction to stop the growth of greenhouse gas emissions. That also was a key reason that New York attorney general Eric Schneiderman, along with several other AGs from different states, opened up an investigation into...