The key sustainable waste management technologies include anaerobic digestion, composting, vermicomposting, and bioremediation. Anaerobic digestion converts organic waste into biogas, reducing methane emissions and providing renewable energy. Composting and vermicomposting decompose waste into nutrient-rich soil amendments, reducing landfill use and promoting soil health. Bioremediation uses microorganisms to degrade pollutants, cleaning up contaminated sites. These technologies not only reduce waste but also mitigate climate change by sequestering carbon, reducing methane emissions, and providing sustainable energy alternatives. Their integration into waste management systems can significantly contribute to a circular economy and sustainable development goals.