Radio broadcasting involves the transmission of audio over radio waves to reach a wide audience. There are various forms of radio broadcasting including AM, FM, commercial, and non-commercial stations. In the UK, the main national radio stations are BBC Radio 1 (popular music), BBC Radio 2 (popular music and talk), BBC Radio 3 (classical music), BBC Radio 4 (news and talk), and BBC Radio 5 Live (sports news). Local BBC radio stations serve specific regions of the UK. BBC World Service broadcasts news and discussions in many languages worldwide without advertisements. The BBC is largely funded by annual television licence fees paid by UK households watching live TV.