The past few weeks of revelations about Donald Trump should convince you of the utility of Twitter’s platform. It is the new news ticker, the way information gets spread at the speed of light by the fastest typists. But that’s merely the networked and mobile technology. If you want to know how valuable the company is, you must ignore the …

  Cheers rose from prominent voices around the world this month when almost all countries agreed to reduce the climate costs of international air travel. The United Nations and the White House applauded the deal, as did the airline industry and even some environmentalists. Yet the agreement hardly qualifies for the praise. It stands to do little to reduce carbon …

  There were demonstrations and rallies on Sunday in France, Spain and Poland against the EU-Canada Comprehensive Economic and Trade Agreement (CETA) and EU-US Transatlantic Trade and Investment Partnership (TTIP). While TTIP is in limbo, CETA is to be signed on October 27. But it can only be struck when all 28 EU member states back it. Tuesday (October 18) …