Artificial intelligence (AI) has emerged as a transformative technology for addressing climate change and advancing sustainable development goals in the United States. This article examines the current applications, challenges, and opportunities of AI in climate action within the American context. Through analysis of federal initiatives, private sector innovations, and academic research, we explore how AI technologies are being deployed across energy systems, transportation, agriculture, and environmental monitoring. The study reveals significant potential for AI to accelerate decarbonization efforts while highlighting critical barriers including data accessibility, algorithmic bias, and energy consumption of AI systems themselves. Our findings suggest that strategic integration of AI with climate policy could enhance the effectiveness of sustainability initiatives by 30-40% by 2030, provided adequate investment in infrastructure and governance frameworks.