The present invention provides a portable processing device comprising a journey type determining module, a journey length determining module and a communication module. The journey type determining module is operable to determine whether a journey undertaken by a person carrying the portable processing device is an environmentally-friendly journey comprising a journey undertaken in an environmentally-friendly vehicle, a journey undertaken using self-propelled means or a journey undertaken on foot. The journey length determining module is operable to determine a length of a said environmentally-friendly journey undertaken by the person carrying the portable processing device. The communication module is operable to transmit journey data to record management apparatus defining the length of the environmentally-friendly journey undertaken by the person carrying the portable processing device.
