WATER: Rivers and streams emit up to 2B tons of CO2 a year -- study Henry Gass, E&E reporter Published: Thursday, November 21, 2013 The list of global greenhouse gas emitters, from coal plants to herds of cows, is a long one. Now you can add rivers. Please subscribe to ClimateWire 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.