1971年，在“禁烟运动”的声势下，美国国会通过了禁止在电视上做烟草广告的法律。令许多人奇

怪的是，这项法案只在美国有效，而且仅限于电视。 This strange limitation was due to the fact that at the time, television was the only medium in which tobacco companies could advertise their products. As a result, Congress felt it had to act quickly and decisively in order to protect citizens from the dangers of smoking. However, since then, other forms of media have become popular and tobacco companies have been able to find new ways to advertise their products. This has led many people to call for a ban on all forms of tobacco advertising.