Environmental sensors are devices that monitor and collect data about the surrounding environment. They can measure various factors such as temperature, humidity, air quality, and light levels. These sensors help us understand our surroundings better and can be used in different settings, from homes to cities, to ensure a healthier environment. These sensors play a crucial role in addressing environmental issues. For example, smart cities use environmental sensors to track pollution levels and improve urban planning. Additionally, farmers utilize these devices to monitor soil conditions, leading to more efficient and sustainable agricultural practices.