In which of the following examples is the farmer utilizing a method of erosion prevention?
a. planting crops repeatedly, without putting nutrients or fertilizer back into the soil
c. allowing cattle to feed in an area until very little vegetation remains
b. planting crops in patterns to reduce water run-off
d. removing soil from a location, and placing it in a water source

Use your vocabulary words to complete the sentences below. more of the world's population is now concentrated in heavily populated urban areas known as a this is quite a contrast from the past when or native groups were either farmers or — hunters and gatherers who moved between places in search of food. advanced technology has led to the integration of world economics and cultures, in the world's more developed countries. this integration requires , the responsible use and management of natural resources.

Compare demographic and environmental effects of the columbian

Solve for r in the formula v = ir, when i = 5 and v = 15.