Final answer:
To combat desertification, nations can implement strategies such as reforestation, conservation agriculture, and water management. Many nations, including China, India, Australia, Algeria, and Brazil, are involved in combating desertification.
Step-by-step explanation:
Desertification is the process of land becoming desert due to various factors such as climate change, deforestation, and unsustainable agricultural practices. To combat desertification, nations can implement several strategies, including:
- Reforestation: Planting trees to prevent soil erosion and provide shade and moisture to the land.
- Conservation agriculture: Adopting sustainable farming practices such as terracing, crop rotation, and contour plowing to prevent soil degradation.
- Water management: Implementing efficient irrigation systems and water conservation measures to preserve water resources.
Many nations, especially those in arid and semi-arid regions, are involved in combating desertification. Examples include China, India, Australia, Algeria, and Brazil. The number of nations involved can vary depending on the specific initiatives and agreements in place.