The document discusses the enviroCar project, which uses sensors in vehicles to collect environmental data. Citizens can install OBD-II adapters and apps in their cars to monitor emissions and fuel consumption data during regular driving. This data is uploaded to a website and used by scientists, administrations, and others to analyze factors like CO2 hotspots, the effects of speed limits on emissions, and individual driving styles on fuel efficiency. The goal is to crowdsource vehicular environmental data from everyday drivers.