[[Environmentalist]]s want the President to push the program. Fred Krupp of the Environmental Defense Fund calls the opportunity "a political moment" to pass a carbon tax estimated to cost the average U.S. household $4300 per year.<ref>[http://blog.heritage.org/2009/05/15/the-4300-energy-tax/ The $4300 Energy Tax,] Nicolas Loris, 15 May 2009. Retrieved from Heritage.org, 19 June 2010.</ref> | [[Environmentalist]]s want the President to push the program. Fred Krupp of the Environmental Defense Fund calls the opportunity "a political moment" to pass a carbon tax estimated to cost the average U.S. household $4300 per year.<ref>[http://blog.heritage.org/2009/05/15/the-4300-energy-tax/ The $4300 Energy Tax,] Nicolas Loris, 15 May 2009. Retrieved from Heritage.org, 19 June 2010.</ref> |