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 technology, such as laser spectroscopy or electrochemical methods, to analyze samples. They can be found in urban areas, industrial sites, and natural environments, contributing to public health and safety by alerting communities to hazardous conditions and enabling timely responses.