Complex sentence: The World LPG Association (WLPGA) is the authoritative global voice for the liquefied petroleum gas (LPG) industry and the worldwide industry association which represents the interests of the LPG industry globally.
Split into simpler sentences: The World LPG Association (WLPGA) is the authoritative global voice for the LPG industry. The WLPGA is a worldwide industry association which represents the interests of the liquefied petroleum gas (LPG) industry globally.