Border Tax Rationalized There are both economic and geopolitical reasons being presented for why the G-7 (U.S., Canada, EU, and Japan) should pursue a common carbon border measure. The first is that it is not in Europe’s interest to go it alone. Brussels could sanctimoniously claim itself pure and impose the border tax but if no one follows, it has fewer imports but also gets underpriced in the world market. Worse, it is still stuck with global warming if everyone else goes on polluting. For the U.S., since it is calculated that China’s manufacturing is three times more polluting, a border carbon tax will save American jobs. Donald Trump’s tariffs helped divert imports toward other countries than China and the carbon tax...