Afforestation involves planting new trees in areas that previously had no trees, creating new forests. It is important for reducing pressure on existing forests, slowing deforestation, and allowing for planting of desired tree species. Afforestation helps combat issues like pollution, soil erosion, and global warming by serving as carbon sinks. The benefits of afforestation include a stable supply of forest products, preventing soil erosion, stabilizing the climate, improving air and water quality, and providing employment. The Indian government implements schemes like the National Afforestation Programme to encourage afforestation.