Oil erosion in the United States .A. has not been adequately mapped by the Soil Conservation Service B. is causing over 30 percent of farmlands in this country to erode faster than the soil can be replaced C. is virtually under control given all the conservation practices implemented D. is highest in the northeastern states

Plzz on what physical process is responsible for the creation of volcanoes, earthquakes and ocean trenches at the plate margins?

How has the geography of india made it difficult for its people to expand before modern technology?

Which ecosystem best fits the characteristics listed below? which ecosystem best fits the characteristics listed below? ii. seasonal migrations of millions of wildebeests, zebras, and elephants iii. large numbers of predators, such as lions iv. acacia trees and grasses a. the congo rainforest b. the african mangroves c. the serengeti grasslands d. the sahel