Long-haul flights over 3,000 kilometers cause significantly more CO2 emissions than short-haul flights. They account for nine percent of all flights, but burn 47 percent of kerosene. In addition, the number of kilometers traveled per person on long-haul flights has increased significantly more than on short-haul flights in recent decades and is likely to continue to rise – but measures have tended to focus on short-haul flights. A recent study therefore advises focusing more on avoiding long-haul flights.