Sustainability is a broad concept encompassing the long-term goal of meeting current needs without compromising the ability of future generations to meet their own. It balances environmental, economic, and social considerations, acknowledging that natural resources are finite. Key aspects include reducing pollution, conserving resources, and promoting social equity. In India, citizen-led initiatives are driving environmental movements through community clean-up drives, tree-planting campaigns, and awareness-building on social media. Businesses and governments are also embracing sustainable practices through green technology, circular economy models, and policies that promote a greener future.