A University of Delhi study found that the Aravalli Biodiversity Park in Delhi retains nearly three million litres of rainwater each year. The 692-acre restored forest, once a degraded mining site, now reduces surface runoff and helps recharge groundwater. Researchers also estimate its trees remove about 127 tonnes of air pollutants annually and store over 8,000 tonnes of carbon. The park supports roughly 700 plant species and 80 native tree species. The study highlights how restoring native forests in urban areas can provide measurable climate and flood control benefits. It values the park's carbon storage at around Rs 11.34 crore and its annual air purification at Rs 1.89 crore, showing concrete economic returns from ecological restoration.
