OIL AND GAS: Couple sues Exxon over alligator-prone sludge disposal site Published: Thursday, March 20, 2014 A Mississippi couple has sued Exxon Mobil Corp. in an unusual land dispute involving alligators and oil sludge. Please subscribe to Greenwire to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.