Before revision:  We also propose a carbon border tax , either as a direct tax or a tax adjustment, applicable at national borders, based on MGHG-INT and MGDP . This carbon tax is supported by a proposed global Emissions Trading System (ETS) applied at the international level. It is assumed that each country will implement its own equivalent carbon tax system to preserve the competitiveness of the marketplace; however, consideration of this aspect of our concept is beyond the scope of our work here.
After revision:  We also propose a carbon border tax , either as a direct tax or a tax adjustment, applicable at national borders, based on MGHG-INT and MGDP . This carbon tax is supported by a proposed global Emissions Trading System (ETS) .