How has technology affected agriculture?
a. by creating more food from fewer crops
c. by limiting the places agricultural products can be sold
b. by opening new land to farming
d. none of the above

17. the soil erosion pictured here is the result of what? a. harvesting renewable resources at a rate greater than the sustainable yield b. a mudslide caused by excessive rains c. harvesting renewable resources at a rate lower than the sustainable yield d. the transition between geologic eras and eons