The Internet of Things (IoT) for smart environments is a key research area focused on leveraging interconnected sensors, actuators, and intelligent systems to monitor, manage, and optimize natural and built environments. Research papers in this domain explore applications such as environmental monitoring, pollution control, energy management, climate regulation, disaster detection, and sustainable resource utilization. Key contributions include context-aware data analytics, edge/fog-assisted real-time processing, AI-driven predictive modeling, and secure, privacy-preserving frameworks for heterogeneous IoT devices. Recent studies also address challenges such as scalability, interoperability, energy efficiency, and robust communication in dynamic and distributed environments. By integrating IoT with advanced analytics, renewable energy sources, and smart infrastructure, research in IoT for smart environments aims to promote sustainability, resilience, and intelligent management of natural and urban ecosystems.