Over at Grist, Mike Tidwell writes about how ExxonMobil, "the biggest contributor to global warming of any company in the world," has become the target of some Nats fans who see the oil company's sponsorship of the 7th-inning stretch at Nationals Park as hugely hypocritical given that the stadium is touted as being the first "green" ballpark in the country. Tidwell is spot on when it comes to pointing out the best ironies in the......