I doubt that acquiring ID is that costly, nearly everyone has ID already, and those that don't are unlikely voters anyway. The schemes in place for controlling GW only restrict some nations, at the cost of trillions not millions, and don't restrict the carbon outputs of the most populous nations, China and India, at all. These schemes seem to be designed not to control GW, but to enact some sort of "social justice" that transfers wealth from "developed" nations to "undeveloped" nations. If anything, China and India are way overdeveloped, yet they are not constrained at all by the current proposed schemes. All these programs will do it transfer the source of pollution to nations that currently make little or no attempt at all to curtail emissions.