Key Points on Desertification
UN's Focus on Desertification
- 2006 Highlight: It was the International Year of Deserts and Desertification, aiming to boost global awareness.
- Impact on People: Semi-arid zones support about 2 billion people across 100+ countries.
- Economic Loss: Deserts expanding equals a loss of $42 billion annually in agricultural production, leading to increased food insecurity and poverty.
Desert Expansion
- Deserts are spreading, and new ones are popping up.
- Satellites are helping keep track of desertification by monitoring temperature, humidity, and dust levels.
Great Green Walls Initiatives
Africa's Great Green Wall
- What's Happening: The Sahara is inching southwards due to desertification, affecting the Sahel area, which is a transition zone between desert and grasslands.
- Population: Approximately 50 million people live on around 5.4 million hectares in countries like Sudan and Ethiopia.
- Farming Woes: Constant cropping of crops like sorghum, cotton, and peanuts is degrading the land and harming food security.
- Solution: The Great Green Wall project aims to plant a 7,000 km long and 15 km wide belt of trees from Senegal to Ethiopia.
China's Green Wall Project
- Preventing Sandstorms: China is also planting a continuous wall of trees to stop sandstorms in Northeast Asia.
- Timeline: This project started in 1978 and is slated for completion by 2050.
Desertification in the Thar Desert
- Location: The Thar Desert stretches across western India and southeastern Pakistan, measuring 800 km long and 400 km wide.
- Climate: It’s hot and dry with only 100-500 mm of rain yearly.
- Soil Issues: Sandy, porous, and low humus soils lead to saline and unproductive agricultural conditions.
- Desertification Causes: Overgrazing and poor farming techniques have exacerbated the situation.
Solutions and Initiatives
- Indira Gandhi Canal: Built post-India's independence in 1947 to bring Himalayan water into the desert, aiming to combat desertification.
- Other Strategies:
- Fuelwood plantations and fast-growing species like eucalyptus.
- Shelters to block wind (often exceeding 150 km/h).
- Stabilizing sand dunes, aerial seeding, and introducing better pasture grasses.
- Promoting silvopasture to combine forestry and grazing.
Remember, desertification isn't just an environmental issue—it's a real economic and social struggle for millions. 🌍🌱