What is the best means of transportation

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

Where the main factor that enabled the growth of cities and civilizations was the existence of

What are some of the impacts of humans on the earth?