The E-P-A is now including data from a network of low-cost air sensors in North Carolina in its official air-quality mapping system. More than five years ago CleanAIRE N-C launched its Citizen Science AirKeeper Program to monitor air quality. Since then the group has expanded its network of monitors measuring invisible fine particulate matter known as P-M-2.5 across the state. Exposure to P-M-2.5 is linked to asthma, heart and lung disease, and even dementia. Maria Sharova with CleanAIRE NC says technology has made it possible for people to track their local air quality with low-cost sensors that can be placed near emissions sources.