What incentives could encourage automobile manufacturers in the United States to produce more fuel-efficient cars? The U. S. government could increase the requirements for fuel efficiency. However, at least two other strong forces are likely to change the types of vehicles that manufacturers produce. What do you think these forces are?

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.