rope were to act unilaterally in imposing a carbon tax to reduce emissions of CO2, how successful would that strategy be in preventing global warming?...

If Europe were to act unilaterally in imposing a carbon tax to reduce emissions of CO2, how successful would that strategy be in preventing global warming? In what sense is the earth"s atmosphere a common property resource? Why does making border tax adjustments according to the destination principle avoid giving a competitive advantage to countries that impose high value-added taxes?