Water on earth is either freshwater or saltwater. what is the percent ratio of freshwater to percent saltwater on earth? a) 1% freshwater : 99% saltwater b) 3% freshwater : 97% saltwater c) 30% freshwater : 70% saltwater d) 50% freshwater : 50% saltwater

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