SPORTS: NFL looks to offset Super Bowl 50's carbon footprint Published: Monday, June 9, 2014 Super Bowl 50 will bring tens of thousands of fans, lots of trash and a sizable carbon footprint to Arizona in February. 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.