International Herald Tribune: European Union governments gave formal approval Friday to a potentially costly system of capping greenhouse gases from any airline flying into or out of the trade bloc — just as the airline industry reported new evidence of the impact of a worsening economy. Airline chiefs immediately criticized the decision, saying it would cost the industry at least 3.5 billion euros ($4.4 billion) each year to comply. The Europeans are “acting in a bubble — even in the middle of a global economic …