Unit 2: Negative externalities associated with meat eating

This BBC clip makes you think of the true cost of meat eating
< http://www.bbc.co.uk/mediaselector/check/player/nol/newsid_6280000/newsid_6289500?redirect=6289542.stm&news=1&amp;nbram=1&nbwm=1&bbwm=1&bbram=1 >

a) What is the private cost of eating meat?
b) What, according to the clip, are the external costs associated with meat eating?
c) How does the meat market therefore fail?
d) Draw a diagram to show this market failure
e) Evaluate the different actions the government could take to reduce this market failure