The term "airfreight" means all goods which are transported by air with a airwaybill.
No other mode of transport has had the same growth as air cargo. One of the reasons for this is that labor has been devided all over the worl and the world economy has become more intense. The share of high-quality goods has risen.
Nearly every airport is also handling air cargo. The avarage size of passenger and cargo aircrafts has increased.