Under the arrangement, the European Union would pare back its regulations, applying them only to its own airspace. The original plan, which the United States and other countries rejected, would have imposed charges for emissions over an airline’s entire route if the flight began or ended in Europe.

Available at: http://www.nytimes.com/2013/09/06/business/global/europe-offers-compromise-to-us-on-airline-emissions.html?_r=0