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 Nationals-ExxonMobil marriage.

The Anacostia River, in fact, on whose bank the new Nationals Park rests, is itself a tidal river vulnerable to sea level rise. If the Greenland ice sheet melts as many scientists say is now possible, we’ll get 23-feet of Potomac-Anacostia River rise in downtown D.C.! Ironically, the playing field at Nationals Park is already several feet below sea level. So the Exxon ad in left field could itself be under water due to our continued use of the advertiser’s product!

There’s also now an online campaign to pressure the Lerners into dumping ExxonMobil as a sponsor. The people behind the web site are encouraging fans to boo when the ExxonMobil sign comes up on the scoreboard at the beginning of the 7th inning stretch — and they claim it’s working.

Photo of protesters from the Strike Out Exxon campaign at the Nats game on Friday night by Shaw_Girl