For this unit Refers to Student’s Book pages Writing headlines

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PhotocoPiable
Cambridge English for the Media   Cambridge University Press 2009     
www.cambridge.org/elt/englishforthemedia
UNIT 2 Radio Teacher’s Notes

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Background information and useful web links
Radio around the world is 
regulated
 by governments or their agencies, and by 
international treaties. There is a limited set of frequency bands on which radio 
stations can transmit their signals, so it makes sense to control who can and who 
can’t transmit on which frequency in which geographical area. International treaties 
are required to prevent, for example, a radio station from one country monopolising 
frequency bands in a neighbouring country, and more generally to promote the 
optimal usage of the radio spectrum. Also, because of the importance of the media in 
controlling information to the public, many governments have sought as much control 
as possible over radio and other media. This led to the establishment and enormous 
influence of state-sponsored broadcasters such as the BBC in Britain. 
The history of 
BBC Radio
 and its competitors in the UK 
http://en.wikipedia.org/wiki/
BBC_Radio#History_of_BBC_Radio
 
http://www.bbc.co.uk/dna/h2g2/A2939411
This shows that the question of