Carbon War Uncertainties USDA Climate Advisor Robert Bonnie is an enthusiastic cheerleader for agriculture both leading and benefiting from the effort to control carbon emissions. He acknowledges that it is not going to be easy, that there are numerous technical issues to resolve, yet somehow sees opportunity in the fact that agriculture’s emissions exceed its sinking by five to one. He references carbon banking but even USDA does not know how to do it and so is soliciting public input.  Meanwhile, sequestering carbon is not even the goal of progressive Democrats. They oppose a carbon tax under the contention that it is regressive and will hurt poor people worse. Meanwhile, moderate Democrats worry that a tax on carbon will be...