What is the primary use of freshwater worldwide? O A. Petroleum refining
O B. Crop irrigation
O C. Manufacturing processes
O D. Drinking water

Which element is used in photosynthesis found in atmosphere and fixed by bacteria?

What happens when the cell copies its chromosomes

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land