BRI’s unique approach adds ceilometer data to ground surveys which are a more economical and accessible measurement method (as compared to air surveys). Surveying air quality with in situ measurements allows scientists to validate air quality measurements that may be made on poor assumptions. They also allow for localization of natural sources to identify point source and area source emissions. Natural sources of gases such as methane are underground reservoirs containing oil, methane, and non-methane hydrocarbons (NMHCs). These are often released from fault lines where migration pathways open and close, allowing for the release of reservoir contents.