Exit Poles? A bold challenge to the EU

After a court ruling in Poland that is an affront to a core European Union principle, Poles hit the streets—fearing a “Pol-exit” they do not want. Who will back down? Hydrogen has been touted for decades as a fuel with green credentials. At last its time has come. And the herd of unicorns popping up in Mexico.For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer