w there are some other common-sense things we can do. 
Unfortunately, we have not done them. We can improve the mileage we get 
from our vehicles. The reason we know that is we have done this. We 
know that Congress can effectively increase the mileage of our 
vehicles. If you look at this graph that shows the mileage our vehicles 
have gotten, as we increase our mileage, we reduce our CO<INF>2</INF> 
emissions.
  In 1975, our cars got 14 miles to a gallon. And then the Congress and 
the President acted in 