Sustainable development is meeting present needs without harming future generations, balancing economic growth, social equity, and environmental protection through integrated actions like the UN's 17 Sustainable Development Goals (SDGs), aiming for a prosperous, inclusive world within planetary limits, tackling poverty, climate change, and inequality. It involves shifting to clean energy, circular economies, responsible consumption, and ensuring access to health, education, and resources for all, now and later, say Britannica, UN Sustainable Development Goals, and United Nations Development Programme.