POLICY: Carbon tax doesn't need to affect the poor, researchers say Evan Lehmann, E&E reporter Published: Monday, August 11, 2014 The biggest problem with a carbon tax might be deciding how to use all the money. 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.