Pollution sensors are devices designed to detect and measure the presence of harmful substances in the environment. They can monitor air quality, water quality, and soil contamination, providing valuable data on pollutants like carbon dioxide, nitrogen dioxide, and particulate matter. These sensors help identify pollution sources and assess the effectiveness of environmental regulations. Many pollution sensors use advanced technologies, such as laser scattering or electrochemical methods, to analyze samples. The data collected can be used by governments, researchers, and communities to make informed decisions about public health and environmental protection.