Since we know that the 55 mile per hour speed limit saves lives ...

[futuristic]

Since we know that the 55 mile per hour speed limit saves lives and gasoline, try to find reasons the speed limit on interstate highways has been set to 65 miles per hour and above in most states.
 
  What will be an ideal response?

Question 2

Explain why cars are responsible for so much of the carbon monoxide emitted every year (see Table 15.5).
 
  What will be an ideal response?

[ebonylittles]

Answer to Question 1

Most people are in a hurry to get where they're going. They tend to underestimate
the risk of accident (see Chs. 20 and 26). The interstate roads are thought to be (and are,
relatively) safer. Politicians were under pressure to raise the speed limit and reduce the
number of traffic tickets.

Answer to Question 2

Carbon monoxide comes from incomplete combustion of fuel. There are so many
cars that collectively they are responsible for much of the carbon monoxide. Where traffic is
caught in a jam, the car idles and relatively more carbon monoxide is emitted. People stuck
in traffic are much more exposed to carbon monoxide than people moving at highway
speeds.

[futuristic]

YES! Correct, THANKS for helping me on my review

[nguyenhoanhat]

Gracias!