HIV is a virus that destroys a type of white blood cell. It cannot be cured.
It can be treated with drugs, which stops the virus replicating.
Suggest why without treatment a person with HIV may die.

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