1) Good resources on the environmental advantages of electric buses
with many working examples from around the world:-

http://citytransport.info/Electbus.htm

2) A modern trolley bus (coach) at work in Rome, demonstrating 'off-
the-wire' operation:-

http://www.youtube.com/watch?v=kSxTniqh_EQ

3) Link to an online petition:-

http://petitions.pm.gov.uk/Trolleybuses/