The growing severity of global environmental challenges necessitates intelligent and sustainable solutions. This paper examines the role of Artificial Intelligence (AI) and Machine Learning (ML) in enhancing green technologies across domains such as renewable energy, waste management, agriculture, and smart cities. It highlights how AI/ML enable pollution monitoring, energy optimization, waste reduction, and efficient food production, supported by real-world applications. The paper also discusses challenges related to ethics, data privacy, and equitable access, and outlines future research directions for advancing sustainable development through AI-driven innovations.