Unit 1 Smoking's decline over the past 50 years

A post from tutor2u including a Ch4 video clip, and historical interviews by the BBC

http://www.tutor2u.net/blog/index.php/economics/comments/unit-1-micro-50-years-of-anti-smoking-campaigns-and-awareness?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+economics_news+%28tutor2u+Economics+Blog%29#When:21:17:24Z

a) What actions have ben introduced to reduce smoking?
b) Comment on the success of these mesures in reducing the consumptoion of this demarit good