To enhance urban greenery and control pollution in Delhi NCR, choosing trees that are resilient to the region\'s semi-arid climate and high pollution levels is essential. These trees should be capable of absorbing pollutants, providing shade, and improving air quality. Here’s a list of the best trees for these purposes: ### 1. **Neem (Azadirachta indica)** - **Benefits**: Excellent at absorbing air pollutants like sulfur dioxide and nitrogen oxides. Known for its medicinal properties. - **Features**: Hardy, drought-resistant, and fast-growing. - **Uses**: Ideal for roadsides, parks, and residential areas. ### 2. **Peepal (Ficus religiosa)** - **Benefits**: Releases oxygen even at night, significantly improving air quality. - **Features**: Large canopy, provides ample shade, and is revered in Indian culture. - **Uses**: Suitable for large parks, open spaces, and avenue planting. ### 3. **Arjun (Terminalia arjuna)** - **Benefits**: Absorbs pollutants and improves the microclimate. Also used in traditional medicine. - **Features**: Tolerant to air pollution and drought, grows well in Delhi’s climate. - **Uses**: Suitable for streets, parks, and public gardens. ### 4. **Jamun (Syzygium cumini)** - **Benefits**: Absorbs carbon dioxide, releases oxygen, and provides shade. - **Features**: Fruit-bearing, attracts birds and wildlife. - **Uses**: Ideal for avenues and urban parks. ### 5. **Gulmohar (Delonix regia)** - **Benefits**: Absorbs dust and other pollutants, provides wide shade. - **Features**: Ornamental tree with bright red flowers, thrives in hot climates. - **Uses**: Great for large open spaces like public parks or broad avenues. ### 6. **Amaltas (Cassia fistula)** - **Benefits**: Reduces air pollution and adds beauty with its striking yellow flowers. - **Features**: Drought-resistant and visually appealing. - **Uses**: Ideal for streets, parks, and urban beautification. ### 7. **Ashoka Tree (Polyalthia longifolia)** - **Benefits**: Known for reducing noise pollution and purifying the air. - **Features**: Tall and slender, making it perfect for urban areas with limited space. - **Uses**: Ideal for roadsides, small gardens, and boundary planting. ### 8. **Mango (Mangifera indica)** - **Benefits**: Absorbs carbon dioxide and provides shade while offering seasonal fruits. - **Features**: Thrives in Delhi\'s climate, attracting birds and wildlife. - **Uses**: Suitable for parks, avenues, and large residential areas. ### 9. **Kachnar (Bauhinia variegata)** - **Benefits**: Improves air quality and adds aesthetic appeal with colorful flowers. - **Features**: Drought-tolerant, moderate growth rate. - **Uses**: Ideal for avenues, gardens, and urban landscaping. ### 10. **Banyan (Ficus benghalensis)** - **Benefits**: Known for absorbing pollutants and offering large areas of shade. - **Features**: Massive tree, long-lived, and important for biodiversity. -