Awaste of product of respiration in animals that is used by plants to carry out photosynthesis is -a) carbon dioxide b) carbon monoxide c) calcium carbonate d) sodium bicarbonate

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