20 Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.
The image shows how ocean water becomes acidic. Match the letters with the labels to describe the process.
А
B
rights reserve

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