What was one effect of the interstate highway act of 1957?
a. the emergence of the car as america’s main mode of transportation
b. the creation of speed limits as a result of increased highway accidents
c. the sluggish development of the airplane industry
d. an increase in the populations of midwestern and western cities
e. fewer jobs because the railroads lost business

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.

hi!

your answer is b

hope this !

~courtney