Republicans are calling for a carbon tax . A group of Republican elder statesmen is calling for a tax on carbon emissions to fight climate change . The group, led by former Secretary of State James A. Baker III, with former Secretary of State George P. Shultz and Henry M. Paulson Jr., a former secretary of the Treasury, says that taxing carbon pollution produced by burning fossil fuels is “a conservative climate solution” based on free-market principles. It would be a neutral tax, that is, the funds collected would be disbursed among American families. The tax would be collected where the fossil fuels enter the economy, such as the mine, well or port; the money raised would be returned to consumers in what the group calls a “carbon dividend” amounting to an estimated $2,000 a year for the average family of four. This is a description of their plan: First, the federal government would impose a gradually increasing tax on carbon dioxide emissions. It might begin at...