Reading on the web about the "Fuel Dumping" trick made me aware of the fuel surcharge, one of several possible charges being added to the base price of a flight. In order to understand the trick better, I would like to know:
What exactly is the fuel surcharge? Is it mandated by law? Is it just a trick that airlines use to keep the base price low?
The screenshot below shows details about what is added to the base price of a Lufthansa ticket DRS - MUC in June 2013. Note the Fuel and Security Surcharge.