Which logical fallacy is used in the text?
We can't let Governor McKnight impose regulations on gas-guzzling cars! Soon enough, he'll start trying to ban all cars!

 - straw man: a misrepresentation of an opponent's position that makes it easier to argue against
 - ad hominem: an attack against the person making the argument, rather than the argument itself
 - slippery slope fallacy: the false assumption that a small first step will lead to extreme consequences
The text argues that banning cars with low fuel efficiency would lead to a ban on all cars. However, this argument offers only an extreme outcome and ignores other possible outcomes. For instance, the law may be limited to cars with low fuel efficiency. This illustrates a type of logical fallacy known as the slippery slope fallacy.